Engine Surge At Idle


I found a wire broken on my TPS a few days ago and the roughness I had went away when I repaired it, but now its surging. Had to rechoke it and it would continue to do the same thing. The engine should be at operating temperature before adjusting idle speed. Or in neutral I could throttle up rpm to 900 to stop the surge and after 2 minutes and it´s fixed itself. Discussion Starter • #1 • Mar 17, 2012. Cause Correction; Low Fuel Level in Tank: Fill fuel supply tank. I just installed a brand new injection pump in, but it didnt fix my problem. Joined May 12, 2000 · 2,372 Posts. Idle Air Volume Learning is an operation to learn the idle air volume that keeps each engine within the specific range. Dodge Dakota Engine Problems. if the idle does surge up and down while at idle and with a fully warmed up engine, (drive for 20 minutes) then read on low idle, read on high idle, read on. I have a 69 Ford Torino with a 302 engine and a holley 650 carb that was rebuilt about 6 months ago. Battery wouldn't turn over the engine despite plenty of recharging time. Started right up and I began working. But, after it is clean it should work better, if not perfect. Have you noticed that the idle seems to surge constantly? Does it constantly move between 800 and 1800 RPM? Does the idle stay steady at 1800 RPM?. Also the cap, rotor and plugs are all brand new. 3l vortec cpi i have put new ac delco plugs and wires and cleaned out the egr valve and it made no change it doesn't die but sometimes when i come to a stop it will surge when you give it gas it runs smooth,it runs absolutely perfect other than this with plenty of power,there are no codes shown so ive been reading it could be a 02 sensor or TPS but. Fixed so far. NHTSA ID Number: 10113691 Manufacturer Communication Number: PI0928E Summary This preliminary informational bulletin provides repair information for a customer concern of a bump, surge or engine vibration while stopped at idle with the transmission in Drive and their foot on the brake. Check the IAC and see if it’s working. He said the engine wouldn't be hurt by a slight surge at startup, or by a slightly high idle, and that the motor seems to run great by the looks and sound of it. al,496HO MPI no modifications. Sometimes it will do it right on cold start for about 30 seconds and then go away and sometimes it will start. no more no less. Sometimes put the transmission in gear will cause a small surge. Over and over. A very common source for a vacuum leak is the intake boot. So yesterday I picked up a 95 cobra and during idle it will intermittently sound like it has a massive cam in it, having the idle surge up and down rapidly, but the motor never dies. Feature: Surge Rating is the amount of wattage the generator can supply for a very short term, as when starting an electric motor. Not jerking, just fluidly moving up and down. The RPMs and the engine of the 2001 Oldsmobile Alero might surge if there is a problem with the oxygen or fuel sensor. on the highway it runs and rides very well, but in slow or city traffic it surges anb bucks like crazy. Going to scan today with a Matco Pro Scan Plus tool hoping to find the issue. Also, when I press on the pedal and accelerate I can see a lot of black smoke from the exhaust behind me. These are the things I have checked:. It's not easy to get a big cam to idle smoothly at 650 RPM (but it may be possible), so you want to go for something easy first. Penny Dodge Dakota JOIN HERE 1/13/2009 23:57:00: RE: Idle Surge IP: Logged Message: Hi,. ORG, I have an issue with my 2010 RGC. I noted a surge in my wifes Infiniti a while back and hooked it up and found that the ignition timing was bouncing back to about 0 during accel. If the engine runs smooth, then the IAC needs to be replaced. The owner just replaced the throttle assembly but still no difference. Benefit: Most manufacturers of small portable generators do not quote or support a surge rating. After messing around it was easier to just raise idle Rpms a little to smooth it out. The MAF (mass air flow) systems used on many cars measure the amount of air flowing through the engine's throttle valve (throttle body) and use that information to determine how much fuel to inject. How to fix a Honda GX390 thats surging or hunting for an idle. 7 v-8 after. you should be idling around 800 or so rpms. We dismantled the Nikki carb on a Scag ztr with Kawasaki engine at work today. (all fuel related stuff) no, not an easy solution to this problem. This problem occurrs when the engine is cold and coming up on temperature. Idle will creep up and peak at 1,500 rpm and then go back down to 700 rpm,it takes about 15-20 seconds for a complete cycle (from 700 rpm up to 1,500 rpm and back down to 700 rpm) It doesnt always do it when the engine is warm. Bill: I have a 1987 318 with a p218 engine that has a similar problem. Reconnect the plug on the idle motor 7. I dont have a scanner yet to check balance rates or anything. The damn engine did whatever it wanted when that went out lol. It had a Check Engine Light for a rear o2 sensor, but that has gone off on its own and I cleared it. When I first start the car in the morning the engine revs really high and then surges up and down, sometimes for several minutes sometimes just for a few seconds. Cause Correction; Low Fuel Level in Tank: Fill fuel supply tank. Since the ECU is not quite as smart as you are and has a very microscopic view of its world, its behavior may seem very strange to you, but seem perfectly normal to the computer. Adjust the throttle stop screw until you have the idle rpm you desire. I take off the air cleaner, check it out, no gas leaks, choke is working fine, nothing visibly wrong. Cold start this morning at 22 Deg. Symptoms were surging at all throttle positions except idle, which it wouldn't. How to Check an Idle Air Control Valve The idle air control valve — also known as the "idle speed control valve" — regulates the idle speed of your engine. I too had my steering column rebuilt, now my :ford: 7. I've checked for leaks and nothing to major. Fixing a surging engine is usually a matter of cleaning the carburetor. While relearning the engine idle speed, the engine may stall and run erratically. Ray, "blue smoke" most of the time means its over fueling. Engine Surge at Idle 10 Answers Car runs fine once she is going but at idle the engine seems to surge/buck forward when idling at a stop sign or red light. Engine speed is primarily determined by the amount of air that is allowed to enter the cylinders. This video will give you a quick tip on diagnosing this idle surge problem before you start replacing parts. Over time, carbon builds up on the electronic throttle body. If you search previous threads for surging idle you will find more information. How do I correct engine surging? Ok, I have a John Deere LA115 Mower. It's a 350 TBI. Still hunts and badly at that!. To prevent severe burns, do not touch these areas while the engine is running–or immediately after it is turned off. The idle motor it self has quite a bit of delay to get the mass of the motor internals moving. It didn't run well. At speeds above 42 mph, the gasoline engine must spin but there may or may not be fuel delivered to it. 0 automatic nsx had timing belt,v/c gasket,oil pan gasket,valve adjustement,drive belts,o2 sensor replaced,cel light came on after repairs,found timing off,corrected car ran perfect for a week and then idle started going very low when coming to a stop. Maybe I read the manual wrong—open the throttle about half way and adjust the carb control rod so that it slips right into the port on the carb throttle. Granted, an uneven idle condition can be found in many different engines. First inspect all hoses and fittings then around the carb or throttle body. It's always when I'm half throttle at cruising speeds it will surge 2-300 rpms and it's annoying as fuck. If it's too high, you'll flood the engine (especially at idle). Discussion Starter • #1 • Jun 20, 2006. Quote Reply Topic: help with engine idle surging,,,,, Posted: 06 Mar 2020 at 9:57pm Our oldest Son has a 2000 Hyundai Elantra with the 4 cylinder engine and has got me buffaloed,,,, The car started getting a very high idle ,,,so I had him pull the throttle body as it had never been off and figured it was gummed up. 2002 Mitsubishi Galant ES. The surging or misfire will usually re-appear, either under specific operating conditions, or randomly. The engine is operating great except when coming off cruise and into idle/neutral it surges about 2 minutes but idle in gear it runs fine. Partial Blockage of Main Jet. Replacing the IACV fixed them both. When I started it up it runs great but the engine surges from idle to 2000rpm then back to idle every 15 seconds. I previously changed the plugs (gapped correctly), engine oil/filter, tranny oil/filter, air filter and the in line fuel filter. After I bumped the pilot richer to a 50, the problem of surging was eliminated. Jump to Latest Follow 1 - 14 of 14 Posts. Problem vehicle, 1999 Chevrolet Silverado 1500 5. Over and over. However, once off idle it would surge and stall. A carbed engine has mixture screws along with a base idle screw, a fuel injected engine the idle is computer controlled. I have been having trouble with A) Rough idle and B) surging power up in the rev range. I narrowed it down to the IAC valve for the idle and thought I would replace both o2 sensors for the CEL. Also on initial cold start up the idle begins at 1500 RPM and slowly. Normally, the PCM should increase the idle speed to compensate for the added load on the engine when the A/C is on. The surge being that, TB tries to drop back where it was used to running before the buildup and too low idle, then ECM tells it to open. Reassemble the air filter, then turn on the engine and let it run for 5 minutes until it warms up. Only idle surge ive ever had with mk3 was because of a vacuum leak. It is the solenoid that bolts to the throttle body that controls changes in the idle caused by loads on the engine. mower has been working great for last 4 years with the same original carb. Engine Surges at Idle is the idle jet is clogged and doesn't deliver quite enough fuel to idle so the governor gooses the gas a touch and the engine over-revs a. After messing around it was easier to just raise idle Rpms a little to smooth it out. Decreased idle speed might occur during coasting conditions or in the event of an accidental vacuum leak to. Never operate the engine with heat shields or guards removed. If the engine is surging upon startup and not settling down to the proper idle, a sticking IAC could be what the issue is. The problem seems to be temp sensitive, runs good when cold but gets worse as it warms up. It must be performed under any of the following conditions: Each time electric throttle control actuator or ECM is replaced. The idle motor it self has quite a bit of delay to get the mass of the motor internals moving. without knowing the car, it's everyone's guess. After I got ditched, it surges like crazy when cold but is fine when @ normal op temp. Even if the engine light doesn't come on, you may find a trouble code pointing to an oxygen sensor or MAF sensor. All filters on machine changed. Reconnect the plug on the idle motor 7. If it's too high, you'll flood the engine (especially at idle). Idle Problem- '81 280zx turbo- turbo surges, engine stalls, rough below 1. Also when driving, if it is cold it will knock really bad, and when warm it will hesitate and try to die at any RPMs below 2,000, so I have been running it in a lower gear to keep engine speed. Does not do it all the time, but revs up a bit then back down like it is cycling to find the right idle speed. it's very strange and i. Posted to European Driveability on 3/18/2013 8 Replies. Ron103067 · (Idle Air Control). A very typical one is my Eagle Talon, that had a vacuum leak and at idle the revs would vary between 500 and 1500 rpm as the ECU was trying to control the idle, but didn't know about the additional air. Is the mixture so rich that it is affecting idle and pick up or too weak that the engine has no power?. Most all startups are good with normal idle. But from a cold start to about 200*, it's fine, The IAC. The weird thing is it runs fine at idle but when I throttle up it just bogs and dies. As the title says Im experiencing intermittent idle surging but it only happens after the engine is warmed up and only when the car is in park. BMW E30 3 Series Idle Speed Troubleshooting. The problem may involve an annoying change (up/down) of engine speed while cruising at a steady pace, a low drop (or even cut-out) at idle or when approaching a stop, a wild high engine speed of several thousand rpm followed by a drop to near zero, etc. It will idle normal for 20-30 second then jump, then idle for 20-30 seconds, and jump again. Sometimes it will do it right on cold start for about 30 seconds and then go away and sometimes it will start. In the case of GM vehicles (and possibly others) if the idle speed is over 200 rpm higher than expected, this code will be set. Re: Ford Edge engine surge problems Post by guycan01 » Fri Dec 09, 2011 12:40 am Have been having this same problem since purchase, 14 months ago now with only 27,341km on the clock, and simply had it with all the BS from my dealer about "no problem" or "all OK from numerous road tests", even had throttle body replaced to no avail. Does not happen all the time and seems to happen after vehicle is warmed up. It will also do a little hesitance when you're accelerating and you let off and then accelerate again. Some models, such as your 2000 528i with the M52TU 6-cylinder engine, have two intake boots. Comment by thomas — 11/06/2013 @ 8:07 pm. from 52 to 48. Surging is when the engine revs change noticeably under constant load and constant throttle (which in theory should result in constant RPM). even at full throttle no load the engine runs on the idle circuit of the carb. Granted, an uneven idle condition can be found in many different engines. My engine has a surge everytime I stop. After you have made the above check, restart the engine and see if the governor now operates correctly. I have a AEM Wideband A/F mixture gauge and when it's missing the gauge jumps up lean anywhere from 15-20. The severity of the phenomenon ranges from a momentary power drop barely registered by the engine instruments to a complete loss of compression in case of a surge. Your engine's optimum idle speed is the RPM that allows the lowest possible engine speed while allowing a stable idle. Back at the dock when I started the motor, it would start 1st crank and idle normally for about 5 seconds, at which time it would surge to about 1100 rpms and stay there. How to repair an engine carburetor that surges, hunts, or waffles. The problem has been occuring intermittently for several years. When I stop at lights with the engine warm the tickover goes to 1000 RPM and if I blip the throttle the engine surges between 1000 and 1500 RPM a couple of times before settling back to !000. however I repaired the water problem but my idle concerne still exist. never installed the new one. Idle speed could not be reduced to the 750 RPM that the car required. 5 » Jul 28, 2009 5:02 AM I have done a pretty extensive search, but have seen either all different causes or old posts that have no conclusions. Not jerking, just fluidly moving up and down. They changed the throtle plate 2 times Its been 6 months and its doing it again. The engine completely stalled one time as I was braking coming off of a freeway off-ramp into a turn. Many times their are multiple problems. The port engine at start up will surge from 800-1000 rpms. As the title says, my truck has a intermittent surge in the idle. For the engine surging making the rpm’s go up and down could be caused by a defective or stuck idle air control valve (IAC). How to Check an Idle Air Control Valve The idle air control valve — also known as the "idle speed control valve" — regulates the idle speed of your engine. Goes up to 48v occasionally. The car surges at idle hot or cold! the surging starts whenever I get the rpms over 1750 give or take. Could it throw a code without the check engine light turning on?. Engine Surges at Idle, Troubleshooting Cummins Diesel Engines. when i am stopped the rpm rises and falls between 1000 an. The 2002 Mercury Cougar has 1 problems reported for surging at idle. spark plug wires are. I have a 2008 Columbia that has just started surging during idling. When you shift into drive the problem resolves itself. I have sprayed carb cleaner all around the intake, throttle body. i have a 2001 1. If you think it can, lower the target idle speed by 50 or 100 RPM (depending on your hunch) and then go through Steps 1-4 again, this time reducing the airflow minimum values by a small margin to make up for the reduced engine speed and considering the thought that you may want to lower idle timing advance a touch as well. 0 automatic nsx had timing belt,v/c gasket,oil pan gasket,valve adjustement,drive belts,o2 sensor replaced,cel light came on after repairs,found timing off,corrected car ran perfect for a week and then idle started going very low when coming to a stop. 1 - 20 of 23 Posts. To ensure a good connection on the 10 pin connectors a little modification can be done which is fairly easy and will cure some surging and hanging idle issues on 86-93 Mustangs and should be the first thing. I installed a 24v CUMMINS into a FORD and got it to crank but having a strange idling issue with the truck idle surging. If the butterfly is closed too much, the revs will drop too far forcing the engine. 0 Mustang Tech: 87: Sep 12, 2009. This video will give you a quick tip on diagnosing this idle surge problem before you start replacing parts. I have a 2008 Columbia that has just started surging during idling. I noted a surge in my wifes Infiniti a while back and hooked it up and found that the ignition timing was bouncing back to about 0 during accel. How To Fix Off-Idle Stumble - Idle Talk The cam's all broken in, the timing and idle mixture are set, and the engine's all warmed up. It seems to do it more in the summer rather than the winter, but i think it may be coincidence. There is no "check engine" light on so there is no codes to look at. Engine Surging at idle. hold your hand in front of the exhaust pipe for a few seconds, smell your hand) It should smell like partially burnt fuel (rich). It can be controlled and reduced by the throttle lever to reduce the rpms. 8t wolfsburg and the idle will bounce from like 600 to 900 up and down continuously and sometimes when i stop the engine will just stall. The check engine light was not on. Engine Surge at Idle 10 Answers Car runs fine once she is going but at idle the engine seems to surge/buck forward when idling at a stop sign or red light. for vacuum leaks, buy can of brake cleaner, stick straw in, and start the engine. Battery wouldn't turn over the engine despite plenty of recharging time. This is adjusted with the large flat head screw on the back side near the double throttle area. when i'm in a parking lot (slow speed), for example, and i let off the gas pedal to make a turn, the vehicle idle will sometimes surge, like i've i've tapped the pedal. When we recently took a trip from New York to Nashville TN, I noticed that the engine surges a bit at idle. After running for several hours today, the check engine. The engine was rebuilt about 25K miles ago and i have receipts for over $6k worth of repairs in hte past 4 years. My 78 SC has the surging idle, only when cold, right after start-up, and only for a few minutes. So far nothing has. It will also do a little hesitance when you're accelerating and you let off and then accelerate again. was great-----Engine fired first time and ran at 700 rpm until warm. I have a mk IV 1. The engine surge is small most of the time (+- 50 RPM off 600 RPM), but occasionally surges +200 and -100 and in rare cases surges +300 RPM. To check the intake plumbing and hoses for signs of leaks, spray carburetor cleaner around the intake and vacuum system. I bought it used and ever since I had it has always had the dreaded surging at idle or slightly above. 2AF, and I mean its perfect!), however if i take it for a bit of a drive, by the time I am back to idle the rpms are jumping between 600-1000. I replaced the transaxle and the engine computer, (seems there was no life in it after storage). After checking and replacing the plugged EGR coolers the engine idle is smoother and power feels better but the surging is still there. The check engine light came on and she's getting poor MPG and strangely the car won't start after stopping and refueling. Ok everyone, here is the update on my idle surge problem! I decided to get every thing back to the way it came when my jeep was new. Replaced both o2 sensors with denso factory units and the CEL went off but now I have this idle surge along with the creeping up idle. I never saw the battery voltage gauge surge though. Idles fine, but every 30 seconds to a minute, it will do a quick surge and then go back to regular idle. My 1998 Ford expedition has a surging idle when topped or in park. Slight surging idle issues: Digital Self-tuning Forum: 14: Apr 16, 2020: K: Engine New Built Engine - Rough Start and Idle Surge: Fox 5. mercedessource Tech help - This can help smooth out a rough shakey idle on an 5 cylinder turbo diesel Overview: The purpose of the rack damper bolt (very center of picture) is to smooth out oscillations of the injection pump fuel delivery rack at idle. So yesterday I picked up a 95 cobra and during idle it will intermittently sound like it has a massive cam in it, having the idle surge up and down rapidly, but the motor never dies. Worse when cold but always present some. Remove the vacuum line to the valve and see if the engine runs smooth. Idle would drop to around 400 then up to 1000 and down. Vacuum leaks in MAF systems will usually cause a rough idle, but often will not result in surging under cruise. It directs air around the closed throttle for engine idling. mower has been working great for last 4 years with the same original carb. The throttle is closed, so very little fuel and air are being drawn in to the cylinders. A restricted idle circuit will cause surging at all speeds when the engine is run under a no load condition. Engine Surging - Snow Thrower. Last year it acquired an erratic idle where it would surge up and down at idle. Put it back in drive, surges more. Includes Honda lawnmowers, pressure washers, generators, etc CLICK HERE FOR THE DRILL BIT SET---- https://amzn. An idle surge can be caused by multiple phenomena. Jump to Latest Follow Not sure if this is the same type problem. The surging or misfire will usually re-appear, either under specific operating conditions, or randomly. This commonly occurs when drivers are stopped at a red light, waiting while parked outside a business or residence, or otherwise stationary with the engine running. repeat this over and over, and you get the constant surging. When I arrive, they had it warmed up and ready to go. I've checked for leaks and nothing to major. To ensure a good connection on the 10 pin connectors a little modification can be done which is fairly easy and will cure some surging and hanging idle issues on 86-93 Mustangs and should be the first thing. If the pressure in a multipoint injected engine doesn't change with power demand, see if the vacuum hose to the pressure regulator fell off. Car runs fine once she is going but at idle the engine seems to surge/buck forward when idling at a stop sign or red light. I was tired of the 2-3000 rpm high idle and intermitant surging as engine warmed up. Engine Surge at Idle 10 Answers Car runs fine once she is going but at idle the engine seems to surge/buck forward when idling at a stop sign or red light. I have sprayed carb cleaner all around the intake, throttle body. Going to scan today with a Matco Pro Scan Plus tool hoping to find the issue. New mafs new tps injectors and plugs and coils please help. This is why there is a misfire at idle. Home Currently the engine starts and revs to 2000 rpm then will slowly start to drop to about 900 (the usual cold engine idle speed, no ac) It will hold steady there for a bit then start to bounce a little with an occasional drop to almost stall then a spike and a return to idle. It's not letting any air in, so the motor dies as the idle mix is too rich. The engine idles perfect when cold and purrrrs like a kitten when driving. I took the vehicle for a second opinion, and the local mechanic agreed that replacing the MAF (Air flow sensor) would solve the problem. It had a Check Engine Light for a rear o2 sensor, but that has gone off on its own and I cleared it. I have a 1997 TJ, and as of late it has starting surging really bad and nearly cutting off at idle. Discussion Starter • #1 • Jul 31, 2006. The high idle is usually a vacuum leak at the carbs somewhere, see if the carb mounts are old or cracked or not sealing to the head or carbs. It is not a drive line issue. A: Idle surge is the condition that occurs when something in the ECU idle speed feedback loop fails to operate as expected. com » Technical, repair and troubleshooting » Engine and transmission » My engine surges at idle Message [Page 1 of 1 ] 1 My engine surges at idle on Thu May 29, 2014 1:42 am. So, so far I have replaced the heater core, installed the proper heater hoses and coolant reservoir, and as for the fix for the idle surge, I replaced several vacuum lines that had lots of holes!. I have been having trouble with A) Rough idle and B) surging power up in the rev range. The engine surged up and down up and down at all throttle settings, so I backed the rod back out (shortened it) and the surging stopped. If the engine runs smooth, then the IAC needs to be replaced. If I apply throttle very gently, it will pick up smoother, however the surge is still there even if I hold the throttle steady. An idle surge can be caused by multiple phenomena. Jump to Latest Follow 1 - 14 of 14 Posts. If you are familiar with your engine's normal idle, compare that to its current RPMs. 0 Mustang Tech: 3: Apr 11, 2020: B: Idle Surge On Fox Body: Fox 5. Basically, it surges to around 3000 rpm, then back off to normal idle, surge up and down a couple of times to around 2000, then surge to 3000 again. Now, it starts ok but the engine revs and slows at idle or under no load. Surging, no power, intermittent rough idle Discussion in ' VT - VX Holden Commodore (1997 - 2002) ' started by EYY , Mar 9, 2016. Going to scan today with a Matco Pro Scan Plus tool hoping to find the issue. Engine Surge at Idle 10 Answers Car runs fine once she is going but at idle the engine seems to surge/buck forward when idling at a stop sign or red light. I have a hard time beli. The engine itself has the most delay from air fuel volume changes to resulting RPM changes. The appropriate fuel system cleaner added to the fuel tank can open clogged passages in injectors and carburetors that may be causing the surge. Question type: Maintenance & Repair. In this article, we'll discuss engine idle issues, surging and "hunting" problems. Mild built n/a LS1. The idle motor it self has quite a bit of delay to get the mass of the motor internals moving. I bought it used and ever since I had it has always had the dreaded surging at idle or slightly above. Caused by using the accelerator at the exact same time as starting the engine. With a cold engine, start the bike and let it run until it reaches normal operating temperature. I pull over and look under the hood, and find that the whole engine is sort of twisting quite severely at about 1 second intervals. A very typical one is my Eagle Talon, that had a vacuum leak and at idle the revs would vary between 500 and 1500 rpm as the ECU was trying to control the idle, but didn't know about the additional air. It runs 100% at everything other than idle. 3L SFI6 104,000 miles The truck starts good, idles smooth but after driving for about 20 minutes it starts surging and "buck. RE: Idle Surge IP: Logged Message: There is an Idle air intake port located on the very front of the throttle body right near the intake manifold. But, after it is clean it should work better, if not perfect. What causes Reduced Engine Power Message, surging idle. Sometimes at a stoplight in gear and truck wants to lunge forward. The patient in this auto maintenance video is an 04 Mazda van that surges at idle but works perfectly otherwise. The idle motor it self has quite a bit of delay to get the mass of the motor internals moving. boro drift Posts: 2316 Joined: Thu Aug 14, 2008 4:26 pm Car: '87 Supra, '92 240 with SR20 and '98 12 valve Cummins. In some cases it may only happen under certain conditions, for example only after the mower gets hot, or only when the fuel level gets low. (this engine surging issue happened before, not common, once in a while) No MIL light while driving, i notice the following: If gas pedal is not pressed, car would gradually increase in speed, gear change, and reach a speed of 60km/hr, slowly but eventually;. Engine Surge at Idle 10 Answers Car runs fine once she is going but at idle the engine seems to surge/buck forward when idling at a stop sign or red light. I have a AEM Wideband A/F mixture gauge and when it's missing the gauge jumps up lean anywhere from 15-20. Idles fine, but every 30 seconds to a minute, it will do a quick surge and then go back to regular idle. About 3 minutes in once it warmed up it started surging and it eventually died. I just bought this truck and have lots of plans for it. The problem was the auxiliary air valve, (AAV) a water temperature control device that Jaguar uses to control idle speed up to and when the engine reaches operating temperatures. turn your idle down using the idle screw on the throttle body and see if that helps. Possibly related, when using cruise control, engine gradually speeds up to about 75 MPH, then drops back to set speed, then speeds up again. when you engage the blades the extra load causes the governor to open the throttle which switches over to the main/high speed jet in the carb and it runs smooth. Joined May 12, 2000 · 2,372 Posts. If you give it a little gas up to. - Engine rpm surges at idle and at highway speeds. Could it throw a code without the check engine light turning on?. 1 Vehicle emissions. 4 liter engine that was stalling at idle and had a surging condition at lower engine rpms. It's not letting any air in, so the motor dies as the idle mix is too rich. Back out the idle screw in the side of the governor about 3 rounds. All systems check out except the FICM. The car surges at idle hot or cold! the surging starts whenever I get the rpms over 1750 give or take. What are the highest "possibles" for this? Some. This usually happens one or two times, then it evens out. So far I have replaced the pre cat o2 sensor, brand new coils and plugs, and. 3L SFI6 104,000 miles The truck starts good, idles smooth but after driving for about 20 minutes it starts surging and "buck. Idle Problem- '81 280zx turbo- turbo surges, engine stalls, rough below 1. Reconnect the plug on the idle motor 7. At full throttle. With a cold engine, start the bike and let it run until it reaches normal operating temperature. As the title says, my truck has a intermittent surge in the idle. ok my s10 has been surging at idle it has a 4. Only happens at these low speeds which is right around 800-1000 RPM, just barely above idle. Under normal circumstances, there should be a very small gap around the butterfly to allow the air required for idle. If I rev it up a couple times, it clears away and idles properly. This applies to all fuel injected BMW and MINI models. it has a new maf and new coils. One of the most common glitches on the BMW E30 3 Series is an erratic engine idle. Re: 2006 ram rough idle Well guys you all have some good info, The rough idle is all the time hot or cold, but the worst after hot pull and stop in traffic or at rest area stop. The problem seems to be temp sensitive, runs good when cold but gets worse as it warms up. Brand new (reman) injectors. The RPMs and the engine of the 2001 Oldsmobile Alero might surge if there is a problem with the oxygen or fuel sensor. The valve acts as the idle control when the throttle is in the closed position. Low freon will make the A/C still work but at a reduced level. 1) the throttle body-mounted idle/WOT switch. He said the engine wouldn't be hurt by a slight surge at startup, or by a slightly high idle, and that the motor seems to run great by the looks and sound of it. Seems to be running fine otherwise. The truck has no other issues and drives like a champ with plenty of power and good fuel economy. Ray, "blue smoke" most of the time means its over fueling. 0 will have these small idle surges of about 100 or 200 RPM while I'm backing it into my garage. We tried one fix at a time to verify the actual cause/fix for the idle surge issue. this problem started after i found water in the crankcase and on the valvetrain. It's not a huge up and down surge but you can sure hear it when you stand by the truck when it's idling and it's annoying, but once you get in and step on the throttle the surging dissapears, otherwise the motor has good power and fuel economy when I'm driving down the road. I've read numerous threads on the rough idle cold start and the engine having some sort of intake leak and I don't believe I have this problem, but I could be wrong. Includes Honda lawnmowers, pressure washers, generators, etc CLICK HERE FOR THE DRILL BIT SET---- https://amzn. As the title says, my truck has a intermittent surge in the idle. Starts great also. 7 v-8 after. ok my s10 has been surging at idle it has a 4. Eventually it just stalls unless I feather the peddle. It may also surge if there is a problem with the fuel injectors or the fuel. Discussion Starter • #1 • Jun 20, 2006. 03 Piolt with 128K miles. More specifically a lean condition. I have 135,000 miles on it. The idle motor it self has quite a bit of delay to get the mass of the motor internals moving. All went well and after putting it back together it still has the same surging issue which is not surprising. I wanted to take a look at the throttle body, so I removed the intake tube … Continue reading "2004 Nissan Altima, P0507 Surging / High Idle". submitted by admin from October, 19 2015. Does the E have one. Started right up and I began working. Start up the engine. Lean Surge Bucking (Solved), Hard Start (Solved), Rough Idle by Bav3. automatic 86k mileage When coming to a stop the rpm drops to 500 and feels like it is going to stall. Had to rechoke it and it would continue to do the same thing. A buddy of mine has a 1997 Ford F150 with the 4. Mild built n/a LS1. 8L Engine (RPO 2H0, Mexico Use Only, Engine Not Used in US and Canada) and 6T40 Automatic Transmission (RPOs MHB, MH8) Vehicles Built Prior to August 1. 8 due to burnt exhaust valves. One sign that your Tecumseh engine is not getting the right air-to-fuel mixture is when the engine dies out during the idle state. Replaced both o2 sensors with denso factory units and the CEL went off but now I have this idle surge along with the creeping up idle. It is throwing no codes. For the past week or so, Mini has a rough idle at cold start up (after sitting overnight). 1) the throttle body-mounted idle/WOT switch. Restart the car, and continue with #5 below: 5. bandit10-4 · Registered. The engine starts right up, then surges and dies. Only happens at these low speeds which is right around 800-1000 RPM, just barely above idle. 2001 Odyssey, 170k mi. It doesn't seem to be consistent in amount of time in between surges but the surging is constant. Now, it starts ok but the engine revs and slows at idle or under no load. This is an idle air motor (IAC) for your 1998-00 Ford Mustang GT 4. meaning its not getting enough gas at idle. It will also do a little hesitance when you're accelerating and you let off and then accelerate again. Cleaning it out with a metal rod fixed the idle problem. How does the engine run when 1st started and at a idle (smooth or surging)? Do you know what rpm the engine is at on a cold start? surging idle - Page 5 - Geo Metro Forum. I get it home, put it in park, and it keeps surging. In the case of GM vehicles (and possibly others) if the idle speed is over 200 rpm higher than expected, this code will be set. Engine surging during idle. After running wide open, then going to an idle, the bike would surge up and down for about 15 seconds. It jammed it to a "stuck open" position, causing a massive vacuum leak, and making the engine "idle-hunt" or "idle-surge". Joined May 2, 2017 · 62 Posts. This is controlled by the engine's computer. Surging is when the engine revs change noticeably under constant load and constant throttle (which in theory should result in constant RPM). So yesterday I picked up a 95 cobra and during idle it will intermittently sound like it has a massive cam in it, having the idle surge up and down rapidly, but the motor never dies. spark plug wires are. Also on initial cold start up the idle begins at 1500 RPM and slowly. ) sometimes I can get rid of it, and other times it's right there. Maybe I read the manual wrong—open the throttle about half way and adjust the carb control rod so that it slips right into the port on the carb throttle. Engine idles OK cold but not when warm. It only does it however, after the engine has been revved up and I am backing the throttle back down to idle. I know this is not normal, is it just a matter of something dirty or could it be a bad part? I have NOT seen the check engine light once turn on since I bought this truck. Idle surge - Please help! Jun 30 2014, 9:50pm Alrighty, I'm no engine tech guy or anything, but I recently purchased a 2003 Chevy Silverado 2500HD (75,000 mi) about 4 months ago and the truck was running great. Question: I have a 1999 Chevrolet Silverado S10 and, lately, the engine has been surging while at an idle. 2002 Mitsubishi Galant ES. 3 E350 is surging on idle. L67 problems. 3L SFI6 104,000 miles The truck starts good, idles smooth but after driving for about 20 minutes it starts surging and "buck. Here is the cause of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any. RE: fixed idle and surging problems! IP: Logged Message: I have a 2000 Jeep grand cherokee and it seems to always roar to 2000 rpm at startup, then sometimes the idle comes down to normal. was great-----Engine fired first time and ran at 700 rpm until warm. As the title says, my truck has a intermittent surge in the idle. When at idle, it surges from around 700 RPM up to 1500 RPM. but when allowed to idle for a second the rpm's start dropping and jumping back up to 800 or so, going between 200-1100 and about cutting off in the process. Once your off the idle circuit the surge usually goes away. Only at an idle though. Home Currently the engine starts and revs to 2000 rpm then will slowly start to drop to about 900 (the usual cold engine idle speed, no ac) It will hold steady there for a bit then start to bounce a little with an occasional drop to almost stall then a spike and a return to idle. After I bumped the pilot richer to a 50, the problem of surging was eliminated. My wideband reads as low as 10 at that point I just recently had a valve job, head shaved, new metal head gasket, Hondata intake manifold gasket. please helpwhen i first start it it sounds like the secondary air pump makes a weird noise. We're not talking about a knocking engine or one that idles rough or stalls. Engine surging during idle. if you can drive above 20mph the tps is good. First thought was to pop the hood and look and listen for vacuum leaks which we did as this would be the most common cause of this idle and surging condition. never installed the new one. Loss of power after hard accel; rough idle, "Check Engine" light on, DTC P1211 Rough idle--manual transmission; "Bearings in a can" rattle noise 96/97 stalling after a long decel/down grade Stall when engaging reverse or manual first gear--auto trans Surge/bucking and jerking at cruise 99 F-series lack of power, rough idle, "Check Engine" light. During decel, with the throttle closed, brake applied on some models, and the engine speed above a certain point (1400 - 1800rpm or so) the ecu shuts off the fuell injectors (decel fuel cut). I have a marine 3116 cat with surging and stalling at idle. I decided I might as well replace. Also, noticed that when I let off the gas and coast, the engine surges sometime about 500 rpm. Aug 1, 2017 • FAQ. Battery wouldn't turn over the engine despite plenty of recharging time. for vacuum leaks, buy can of brake cleaner, stick straw in, and start the engine. It surges from idle to about 1200 rpm Up and down. The straight truck I drive has a Cat 3126 in it, and today it started "surging" when ever there is a load put on the engine. I know this is not normal, is it just a matter of something dirty or could it be a bad part? I have NOT seen the check engine light once turn on since I bought this truck. I have a 2003 Dakota with the 4. I installed a 24v CUMMINS into a FORD and got it to crank but having a strange idling issue with the truck idle surging. Idle would drop to around 400 then up to 1000 and down. The valve acts as the idle control when the throttle is in the closed position. I did a quick check of the engine codes and found multiple lean codes. The engine should be at operating temperature before adjusting idle speed. 2L VTEC SOHC (NO CHECK ENGINE LIGHT!) The car surges at idle hot or cold! the surging starts whenever I get the rpms over 1750 give or take. If you are familiar with your engine's normal idle, compare that to its current RPMs. See attachment for testing. (44-46v) on cold start up. My wideband reads as low as 10 at that point I just recently had a valve job, head shaved, new metal head gasket, Hondata. strong idle surging Nice hot 86* day, was using start stop to quiet the fan from sounding like a tornado approaching but each time it would kick on after being stopped, the surge would be so great I'd have to hit the brake to keep from hitting the car in front of me (yes ample room in front). A misfire may occur when your engine is idling, causing a rough or uneven idle. When idling, the engine runs without any loads except the engine accessories. Diesel surge. Often this problem can be corrected without much work. After the engine reaches idle, it may be re-accelerated back to power. 0 Mustang Tech: 3: Apr 11, 2020: B: Idle Surge On Fox Body: Fox 5. It’s prone mostly to V8s that are force-fed with a large Roots-style supercharger. Penny Dodge Dakota JOIN HERE 1/13/2009 23:57:00: RE: Idle Surge IP: Logged Message: Hi,. 6 L) experiences an idle surge problem. 4 turbo had the check engine light and surge at idle at just over 31K - - Superior Chevy in Conway AR replaced the valve cover gasket 2 days ago. "Ok wierd! I am having the same problem, supper glad I stumbled on to this thread. 7 and the idle started surging the other day. 3 idle surging. I have a 2008 Columbia that has just started surging during idling. or 50 below nominal. When I remove the oil cap, the idle rpms go down some, but not too much because the engine keeps running as it should. (this engine surging issue happened before, not common, once in a while) No MIL light while driving, i notice the following: If gas pedal is not pressed, car would gradually increase in speed, gear change, and reach a speed of 60km/hr, slowly but eventually;. 0 will have these small idle surges of about 100 or 200 RPM while I'm backing it into my garage. Mazda6 idle surge. Joined Apr 29, 2006 · 1,893 Posts. My truck is surging badly, really cant drive , it just bucks like crazy, When Im in the drive way with the hood up, it just constanty surges, around 600 rpm to 900 rpm, every sec or 2, it wont stop,and wont stay running at idle while just setting, if I take loose the vac going to the pcv it still surges but with just verly stay running, last night trying to get home from work it was bucking. It's only happening when the engine is warm. I had idle problems when my engine was almost warmed up, and when restarting at a temp of about 150F. What are the highest "possibles" for this? Some. AGAIN: I get this Surging ONLY when the engine is WARM and at IDLE. This is for bowl type carburetors only. You may want to perform a compression test to confirm the pressure is within the manufacturer's specs. I have a 2006 Commander with the 4. When we recently took a trip from New York to Nashville TN, I noticed that the engine surges a bit at idle. The hesitation lasts for but a second or two at most. the usual problem is that the passages get clogged with carbon (think soot in a chimney) and that causes the air bypass to choke the engine down and the idle to surge. Also I've notice after pressing the gas a few times and warmed up the engine runs rich and dies. Engine Surge at Idle 10 Answers Car runs fine once she is going but at idle the engine seems to surge/buck forward when idling at a stop sign or red light. My 87 Bronco has developed an issue on start up whereas the engine will begin to surge and sometimes die. Now it runs but the idle still surges. You check to ensure this is actually the problem by spraying starter fluid at the gasket while its surging and see if it clears up. 3L V8 2WD with 351,000mi. then when the rpms got too high, the governor reduced throttle. Penny Dodge Dakota JOIN HERE 1/13/2009 23:57:00: RE: Idle Surge IP: Logged Message: Hi,. Kohler SV600 Engine Surging As winter is winding down, I pulled out the lawn tractor to prepare for some lawn work. A fuel filter is very cheap, and takes only a couple of minutes to install. In this article, we'll discuss engine idle issues, surging and "hunting" problems. When checking the outside for cosmetic stuff, the engine would idle at ~800-900 but would surge and sound like it was almost going to die. If the surging stops, you have a governor problem. 0 will have these small idle surges of about 100 or 200 RPM while I'm backing it into my garage. Re: 1994 Astro Engine Surge at Idle I finally put my timing light on just to check, because one of the mechanics had told me it was varying. 5L Turbo Powertrain (EJ Series Factory 2. And the screws DO control idle mixture, That is the only variable. But it starts up really easy. It didn't run well. Lawn mower engine surging is a right pain in the Jacksie, it's an engine that runs erratically, revs up and down by itself uncontrollably. engine rpm surging highand low at idle and driving speed. spark plug wires are fine, cooling fins are clear/clean, the engine. 4 Engine Diagram) over is actually branded using: 1997 ford f150 5. When idling, the engine runs without any loads except the engine accessories. Ok a little background, the vehicle has 54k on the ticker and I recently pulled it out of storage because I blew a transaxle. However, it is easy to recognize the problem, as during rough idling either the engine would run at an irregular rate or it may have varying RPMs without your. They swapped the old throttle body over to the new used engine and just about every other electrical before they gave us a call. Above idle, at faster engine RPM, there is no time for the cylinder to leak, so no engine misfire. A bad connection with the 10 pin (salt and pepper shakers) black and white engine electrical connectors can also cause poor idle quality. Notice while at a stop/red light if I put the car in N the engine surges up and down like the idle is not constant. The engine sounded good at fast idle, then as the engine slowed the surge returned. Engine Surge at Idle 10 Answers Car runs fine once she is going but at idle the engine seems to surge/buck forward when idling at a stop sign or red light. This erratic idle occurs even after being fully warmed up. If you search previous threads for surging idle you will find more information. Even if the engine light doesn't come on, you may find a trouble code pointing to an oxygen sensor or MAF sensor. Hey Guys, I have been looking around and cannot seem to find the answer to my problem. Some engines will seem to surge when there's no load because when the drive, auger (if a snow blower) or blade (if a mower) are disengaged, the governor will keep it from reaching full throttle. After you have made the above check, restart the engine and see if the governor now operates correctly. Also go to IKnow topics and search surge at idle. I've had two cars (not Subarus) with idle problems - one had a surging idle and the other would stall at idle. Miller 325 CH730 idle surge Engine is in a 325 miller trailblazer, model CH730-3267 s/n- 4317807711. Clean it up, put it back together, you're done. At cold start-up it has a rough/choppy idle and seems to smell a little rich. First let's cover the "basics. Partial Blockage of Main Jet. It had a Check Engine Light for a rear o2 sensor, but that has gone off on its own and I cleared it. The FI computer looks at this switch for a sign that the throttle is completely closed and then it turns over idle speed to the ICV. 4T has a bad idle surge (550 to 1100 rpm) which causes a rough downshift when starting off. The commonest cause for surging / loping where the engine revs to around 2000rpm and then drops back to around 1000rpm is cycling on the fuel cut. Also when driving, if it is cold it will knock really bad, and when warm it will hesitate and try to die at any RPMs below 2,000, so I have been running it in a lower gear to keep engine speed. Anyone had this problem?. This usually happens one or two times, then it evens out. Unplug the exhaust back pressure sensor while running. I have a 2003 dodge with a cummins diesel and a while back I noticed the engine runs unsteady at idlesurges. Many times their are multiple problems. You drop it in gear, tip in the throttle, and the engine. Check the IAC and see if it’s working. Cause Correction; Low Fuel Level in Tank: Fill fuel supply tank. It's been pretty cold up here in the northeast for the past month or so, temps around the 30 degree mark, and when I started up my car the other day to warm it up, after a few mins after I came back the engine was surging. With the engine at idle, move the governor lever with your finger to open the throttle and it should push the arm back toward idle if working properly. All filters on machine changed. Engine Surge at Idle. 8L Engine (RPO 2H0, Mexico Use Only, Engine Not Used in US and Canada) and 6T40 Automatic Transmission (RPOs MHB, MH8) Vehicles Built Prior to August 1. Adjust the throttle stop screw until you have the idle rpm you desire. Aug 1, 2017 • FAQ. The engine noise gets extremely quiet when it drops down to 500 RPM. The high idle is usually a vacuum leak at the carbs somewhere, see if the carb mounts are old or cracked or not sealing to the head or carbs. I un-hooked the MAP sensor and it went to a steady idle but you can't drive with it off so I hooked it back up, turned the car on and back to the same old surging. The 2002 Mercury Cougar has 1 problems reported for surging at idle. Hints and Tips: Volkswagon Idle Speed Problems Increased idle speed, fault code 533 Cause: Clashing endurance in changes of idle speed. So, so far I have replaced the heater core, installed the proper heater hoses and coolant reservoir, and as for the fix for the idle surge, I replaced several vacuum lines that had lots of holes!. The engine surge is small most of the time (+- 50 RPM off 600 RPM), but occasionally surges +200 and -100 and in rare cases surges +300 RPM. Engine surging at idle??? Jump to Latest Follow 1 - 6 of 6 Posts. I have been having trouble with A) Rough idle and B) surging power up in the rev range. Remove the vacuum line to the valve and see if the engine runs smooth. Tapping the 'lower speed' button slows it down, but it starts climbing again. A leak in the intake/vacuum system will cause surging in the motor, especially at idle. I too had my steering column rebuilt, now my :ford: 7. At idle, your engine is turning relatively slowly, let’s say 1000 rpms. I don't know if there is much info about this issue on this particular board, but if you look on rangerovers[dot]net, you can probably find a lot of. Curious as im fighting the rough idle after a steering column rebuild. The check engine light came on and then the 'service traction control' came on but went off the next time I started it. Replaced the o2 sensor, checked for vacuum leaks as far as visually and spraying carb cleaner around the injectors. By definition, blower surge is a rhythmic acceleration and deceleration of engine speed at idle. If you have a Surging idle on Honda, read this post. The engine was rebuilt about 25K miles ago and i have receipts for over $6k worth of repairs in hte past 4 years. I was tired of the 2-3000 rpm high idle and intermitant surging as engine warmed up. Re-timed it to 8* at 1000 rpm, re-set low idle, hooked vacuum back up 3000 rpm 34 * timing. Car surges when air conditioning is on Inspection Service For most of us, turning on the AC on a hot summer day is a relief. The engine surges bad enough to shake the entire bus. i have a 2001 1. Before this happened, it was jerking or surging (might be the same) a little when the engine is cold but runs fine when @ normal op temp. R56 surging and stalling during warm-up Vehicle is standard R56 2007 mini cooper (not 's'). This is controlled by the engine's computer. While traveling with fixed position of the go-pedal, the gasoline engine RPM and load and electric drive torque should stay pretty constant. Lawnmower guy here The carb is probably plugged up a bit, which causes the engine to run lean, which causes the the engine speed to fall off, and the governor forces the carb to open more, thus the surge cycle begins. For the past week or so, Mini has a rough idle at cold start up (after sitting overnight). One sign that your Tecumseh engine is not getting the right air-to-fuel mixture is when the engine dies out during the idle state. 5 » Jul 28, 2009 5:02 AM I have done a pretty extensive search, but have seen either all different causes or old posts that have no conclusions. So now Im at a brick wall. ok here is the problem. It doesn't appear to be spinning fast enough so I bench tested the starter. So far I have: Cleaned the carb Completely Replaced the carb Adjusted the idle Replaced the gas Replaced the air filter Replaced the spark plug Replaced the gas with fresh Replaced the fuel line Attempted to adjust the governor per YouTube instructions. Decreased idle speed might occur during coasting conditions or in the event of an accidental vacuum leak to. when you engage the blades the extra load causes the governor to open the throttle which switches over to the main/high speed jet in the carb and it runs smooth. Vacuum leaks in MAF systems will usually cause a rough idle, but often will not result in surging under cruise. Is the mixture so rich that it is affecting idle and pick up or too weak that the engine has no power?. It only uses a minimal set of sensor data. Ever since I got it back together it runs great except for just off-idle. At idle the engine in my 2 year old Honda powered mover is surging something fierce. This was causing problems on TE#1, erratic and high idle. So make sure to check the system as well, if necessary. This is adjusted with the large flat head screw on the back side near the double throttle area. Symptoms were surging at all throttle positions except idle, which it wouldn't. NHTSA ID Number: 10113691 Manufacturer Communication Number: PI0928E Summary This preliminary informational bulletin provides repair information for a customer concern of a bump, surge or engine vibration while stopped at idle with the transmission in Drive and their foot on the brake. until started at the 4th place and engine started "surging" at idle speed. But most of the time it will surge, untill i kick it down. I'm planning on replacing it with the DC Sports single canister, single exit cat-back exhaust system (DC Sports® - Single Canister™ 304 SS Cat-Back Exhaust System with Single Rear Exit). A faulty IAC normally causes surges and poor idle quality. 9 Affected Products Vehicles MAKE MODEL YEAR BUICK ENCORE 2013-2014 CHEVROLET CRUZE 2012-2014 CHEVROLET SONIC. Granted, an uneven idle condition can be found in many different engines. Idle was fine initially but when the engine temp got up to where the temp gauge was half way to normal operating temp the surging would start. After the bike was warmed up I noticed that when I stopped at a traffic signal the RPMS were surging from 800 to 900 rpms. If one or more cylinders are low, that too will cause idle issues. Possibly related, when using cruise control, engine gradually speeds up to about 75 MPH, then drops back to set speed, then speeds up again.

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