Engine Surge At Idle






































Trimmer: Engine Rpm's Surge Up And Down Keep playing with the low speed needle until you get rapid immediate response from the throttle, and good idle with the idle adjustment. The dreaded engine surge. Idle mixture is a combination of the air going into the engine AND the emulsified fuel coming out of the carb. The hesitation lasts for but a second or two at most. 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. then i also seen in. If i idle it to temperature it runs great with a perfect solid rpm/air fuel (850rpm, 13. Sometimes it will actually stall… And the fuel-mileage has become VERY poor since this started. While idling, my rpm will surge from about 1100 to 1700 over the time frame of a second or two then return to 1100 over that same time frame, then repeat. After you drive it for a couple of minutes then stop at a stop-sign or red-light, the idle will “surge” — like it’s trying to stall out and then revs up to recover, over and over. 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. Cause Correction; Low Fuel Level in Tank: Fill fuel supply tank. When you experience idle surge or your Honda fails to idle when warm, chances are your thermowax pellet is damaged or simply worn. (all fuel related stuff) no, not an easy solution to this problem. I coasted to the side, tried starting it a few times and things were fine. When we recently took a trip from New York to Nashville TN, I noticed that the engine surges a bit at idle. it's very strange and i. 4 engine diagram, 1999 ford f150 5. So now Im at a brick wall. 10 Answers. My 1998 Nissan Altima has been idle hunting/surging at startup for a while, and also has a slightly high idle after highway driving. Almost reminds me of a downshift, but it keeps doing it until I apply the. Going to scan today with a Matco Pro Scan Plus tool hoping to find the issue. Also go to IKnow topics and search surge at idle. I have a 2008 Columbia that has just started surging during idling. Year: 1995 Mileage: 132,000 My 1995 Nissan Sentra (1. chevy forum at Car Dealer Forums; Truck runs great, but recently when the engine comes off the enriching circuit. A wide variety of issues can prompt an engine surge. I did notice that even after it warmed up, the idle was about 1000rpm. 2 to assist with my LSX Conversion shop, start ups ,gear changes,ect. First let's cover the "basics" in terms of the possible causes of engine surging/hunting, where engine speed suddenly (or slowly) changes. i swapped the engine a while back and has been doing it since and i have been trying to figure it out since then. On later L-Jetronic and on Motronic engine management systems the idle control valve is controlled by the engine management system. automatic transmission. 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. " I was told this could be a "dirty ETV. The problem seems to be temp sensitive, runs good when cold but gets worse as it warms up. The high pressure side typically runs at about 500 psi at idle, 1,200 psi at about 3,300 rpm and about 3,600 psi under full-load acceleration. Subject: Bump, Surge or Vibration at Idle in Drive at a Stop Models: 2013-2014 Buick Encore 2012-2014 Chevrolet Cruze, Sonic 2013 Chevrolet Tracker, Trax Equipped with 1. 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. At idle the engine in my 2 year old Honda powered mover is surging something fierce. As the title says, my truck has a intermittent surge in the idle. 5S came in with a high cold idle followed by a high and surging warm idle. Car surges,idle goes very low and almost stalls when coming to a stop. A Briggs & Stratton lawn mower engine uses a carburetor to mix the gasoline and air that is pulled into the cylinder for propulsion. 02-22-1 11/11/02 ^ driveabilit y - surge/rolling idle - gear driven synchronizers - incorrec t install ation - camsh af t position synchronizer (cmp) install ation tool correct application ^ engine - gear driven synchronizers -. Joined Apr 29, 2006 · 1,893 Posts. I have a 2003 Dakota with the 4. If electronic TB then the TB aircrack can get buildup on it at the butterfly edges that then affects the aircrack there and then engine can have issues trying to decide where to put the throttle blade at idle. The engine surges bad enough to shake the entire bus. 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. Lets say for example you filled up with fuel and it takes you 5 minutes before you restart the bike. Disconnect the throttle linkage to make sure the governor lever is free. The engine sounded good at fast idle, then as the engine slowed the surge returned. I found an electrical connector disconnected down close to the pre cat O2 sensor but I. A carbed engine has mixture screws along with a base idle screw, a fuel injected engine the idle is computer controlled. If you are familiar with your engine's normal idle, compare that to its current RPMs. Benefit: Most manufacturers of small portable generators do not quote or support a surge rating. This is what I am experiencing. 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. chevy forum at Car Dealer Forums; Truck runs great, but recently when the engine comes off the enriching circuit. I took my car to the shop, and this is what was. Brand new. 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. A bad connection with the 10 pin (salt and pepper shakers) black and white engine electrical connectors can also cause poor idle quality. Surging idle, before and after new IAC valve. I would drive the car at higher speeds without feeling a pulse, but it would return when I stop. Back out the idle screw in the side of the governor about 3 rounds. 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). When I move on and stop again the revs fall to normal. the carb didnt supply gas at idle, so the throttle would kick high by the governor. It still have surges. A "2" engine is a 04 and a 1/2 and same as used in a 05. It has the single cylinder brigs engine. And a new starter assembly. Once it hits about 200*, the surging starts, and if I restart it warm, it surges right away. By definition, blower surge is a rhythmic acceleration and deceleration of engine speed at idle. Engine surges when warm in gear, stopped with brake applied. for vacuum leaks, buy can of brake cleaner, stick straw in, and start the engine. Re: Volvo Penta, surging at idle, stalls when given throttle make sure the fuel vent is not plugged, when it is running poorly try loosening the fuel cap and see if it sucks in air and runs better, i had this problem and one engine would bogg down b 4 the other for some reason, just a shot in the dark good luck. And to help diagnose I have a video for you since videos should be mandatory for a clean diagnosis IMO. ok they said maby bleed the coolant cause it could have gotten air in it. Mine was coming from the upper intake gasket. It then jumps back up to about 750, but idles rough. 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. 8 due to burnt exhaust valves. One of the main causes is a bad injector pump. i swapped the engine a while back and has been doing it since and i have been trying to figure it out since then. I am having the same trouble with surging did the fule pump fix it. Feels like someone is on/off/on/off/on the gas pedal. Engine surges, up and down, when cold, from about 1,000 rpm to 2,000 rpm. "83 KZ1100 Spectre, '81 Yamaha XV750 Cafe, '74 Kawasaki H2B 750. Now, it starts ok but the engine revs and slows at idle or under no load. The book says air leaks in the carb. automatic 86k mileage When coming to a stop the rpm drops to 500 and feels like it is going to stall. Would anyone know what would cause an engine to "surge" like in this video. Brand new (reman) injectors. This video will give you a quick tip on diagnosing this idle surge problem before you start replacing parts. The patient in this auto maintenance video is an 04 Mazda van that surges at idle but works perfectly otherwise. At full throttle. 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. 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. 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). 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. Discussion Starter • #1 • Jun 20, 2006. It's a 350 TBI. 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. so I pulled the engine and did all the work. 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. I take off the air cleaner, check it out, no gas leaks, choke is working fine, nothing visibly wrong. Last year it acquired an erratic idle where it would surge up and down at idle. Idle problems This is meant mostly for 96+ cars. No engine codes to date. Why does engine surge when car is at a stop? Share this: when the engine is cold. If you search previous threads for surging idle you will find more information. 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. My engine surges at idle and when cruising. Benefit: Most manufacturers of small portable generators do not quote or support a surge rating. It also will do this if I put in Park. i wanna run sum across yas to see if maby ud be able to help me better under stand. A faulty IAC normally causes surges and poor idle quality. 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. Runs smooth when on the road. Discussion Starter • #1 • Jul 31, 2006. Engine surging during idle. Average repair cost is $3,500 at 68,900 miles. my '03 element is experiencing a surging idle. A: Idle surge is the condition that occurs when something in the ECU idle speed feedback loop fails to operate as expected. Onan engine running on choke, hunting, RPMs changing, wont idle, idle rough The jet has small pin hole orifices and once plugged up you will no longer be able to idle smooth and most likely need to use the choke to keep it running smooth. Idle jumps up 50-100 rpm. if this is a v6 engine it could be anything, but you must check all emissions equipment, vacuum lines, clean idle air control valve and and especially test and clean the egr valve and test map sensor,and others-fuel pump and fuel pressure, injectors, etc. After the engine reaches idle, it may be re-accelerated back to power. Figured it was a carb issue so ordered a rebuild kit from Kohler and tore it down not finding any kind of dirt or debris anywhere. 3 idle surging. The car has already been in the shop before for a rough idle but was repeatedly told it was "normal". The truck has no other issues and drives like a champ with plenty of power and good fuel economy. But from a cold start to about 200*, it's fine, The IAC. I used a VCDS reader that I borrowed from a friend and found the following fault: Address 01: Engine 16485 - Mass Air Flow Sensor (G70): Implausible Signal P0101 -35-10 - - - Intermittent Address 02: Auto Trans No fault code found This leads me to believe the problem is a failing/failed MAF. So far I have replaced the pre cat o2 sensor, brand new coils and plugs, and. A crankshaft position sensor features a permanent magnet and generates an AC signal as the toothed position wheel sweeps past the sensor. Discussion Starter • #1 • Apr 10, 2018. 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. Fuel cut is inhibited by the ECU until the engine reaches a certain temperature, so usually the surging does not start until after the engine has been running at a high idle for a couple of minutes. What are the highest "possibles" for this? Some. cat235d · Registered. The high pressure side typically runs at about 500 psi at idle, 1,200 psi at about 3,300 rpm and about 3,600 psi under full-load acceleration. 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. Surge at idle when warmed up. Enough to feel the car lightly "shake". We'll define "stable" as +/- 50 RPM from the target idle speed you set. It is throwing no codes. As the title says, the engine-Kohler 18hp on my 2000 model year 3184 is surging and then dying at low idle when it warms up after a few minutes. After I got ditched, it surges like crazy when cold but is fine when @ normal op temp. Hey all, I've been having some trouble with an '08 Nissan 6HP outboard. Surge at idle when warmed up. This problem occurrs when the engine is cold and coming up on temperature. Again, ty soooo. hi , i have a strange issue that's a bit difficult to describe. 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. Finally, also when I start the engine, put it into reverse, it slams into gear and dies. A few of the things I noticed right away was a fairly new battery. Fine-tune the idle in three steps: turn the screw clockwise until the engine begins to slow. My idle air bleeds are 70/70 according to my Quick fuel carb card. - when stopped in Drive, it lurches and surges and won't idle smoothly - the idle revs are high in Park or Neutral, at 1500, instead of the usual ~700 If I turn it off for a few minutes, it'll usually go back to normal, and the engine light will turn off a few hours or a day later. Joined Mar 17, 2012 · 2 Posts. A no load surge is caused by the idle jet being clogged with dirt or debris. Engine speed is primarily determined by the amount of air that is allowed to enter the cylinders. It directs air around the closed throttle for engine idling. 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. It is because rough idle when warm can either be caused by one faulty component or through series of problems. I've had the motor for about a year and it's mostly used for maneuvering around launching ramps and mooring fields, plus it gets laid down on its side for long periods (the correct side at least). Penny Dodge Dakota JOIN HERE 1/13/2009 23:57:00: RE: Idle Surge IP: Logged Message: Hi,. Im currently working on a Mack E7-300, and for some reason it has a surging idle, hot or cold, its a V-Mack 1. This is just an idle screw, not a valve that is open or closed. I just returned from a nice Sunday ride for lunch on a new to me 2008. Many thanks Sogwo - I had the exact same symptoms (idle surging once the engine was warm) and just as you found, the fitting on the thermostat housing that goes to the throttle body was clogged. if the idle speed is above that point then the engine will surge at "idle" just like you described. It has no active codes when i hook it up wi. Re: Volvo Penta, surging at idle, stalls when given throttle make sure the fuel vent is not plugged, when it is running poorly try loosening the fuel cap and see if it sucks in air and runs better, i had this problem and one engine would bogg down b 4 the other for some reason, just a shot in the dark good luck. Engine will run, but it surges, hunts for a constant RPM. More specifically a lean condition. 1; 2; Next. BMW E30 3 Series Idle Speed Troubleshooting. 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. i have a 2001 1. 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. 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?. When the engine is started cold, regardless of the outside temperature, the idle is rough and there is a noticable power loss. so I pulled the engine and did all the work. tapping the accelerator will bring the idle down to normal, but then it will rhythmically rev from less than 1k to above 2k rpms at about 1/sec. Going to scan today with a Matco Pro Scan Plus tool hoping to find the issue. Look for a high engine idle. When driving the car and coasting in. Diesel engines (we’ll cite Ford’s 7. Tried all that. The motor is a Vert. 1 of 2 Go to page. Many times their are multiple problems. So I'm getting a light "surging" with my engine. submitted by admin from October, 19 2015. So go easy on me. My idle was so bad it started dieing on its own. It doesn't seem to be consistent in amount of time in between surges but the surging is constant. The book says air leaks in the carb. It is not a drive line issue. 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. fuel injection. I'm thinking it might be the transmission or some other sensor. The hesitation lasts for but a second or two at most. If a snow thrower engine is not operating as a it did when it was new, then probable causes to this issues are most likely fuel or fuel line related. So far, engine and ECM seem to be working wonderfully. I just installed a brand new injection pump in, but it didnt fix my problem. Idle speed could not be reduced to the 750 RPM that the car required. usually the engine runs poorly and the transmission shifts harsh. I can hold foot on gas pedal and it will idle fine but alone it surges and often stalls then restarts ok. After running wide open, then going to an idle, the bike would surge up and down for about 15 seconds. Engine surges when idling Hey guys, so went to look at a 99 today and mr an my dad test drove it. Engine surges at idle 07-31-2016, 04:11 PM. Tear it apart and clean. Disconnect the throttle linkage to make sure the governor lever is free. If the butterfly is closed too much, the revs will drop too far forcing the engine. Even driving off from a stand still ( like a red light ), the engine idle surging causes some minor surging of the transmission and drivetrain and causes the motorhome itself to jerk a very small but perceptible amount. This applies to all fuel injected BMW and MINI models. 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). The hesitation lasts for but a second or two at most. It still have surges. I had the same problem; my high idle was from a sticking dashpot. All filters on machine changed. alrman Senior Member. Only idle surge ive ever had with mk3 was because of a vacuum leak. The adjustment is made by turning the allen-head screw (5/16" ?)which is located in the upper area of the block and a bit tricky to access (doesn't matter if you're blind. somtimes if I rev it up for a bit it will calm down for a few seconds and then start surging again. 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. Slight surging idle issues: Digital Self-tuning Forum: 14: Apr 16, 2020: K: Engine New Built Engine - Rough Start and Idle Surge: Fox 5. 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. 4 liter engine that was stalling at idle and had a surging condition at lower engine rpms. Once I tapped the gas pedal in gear and the engine died. A no load surge is caused by the idle jet being clogged with dirt or debris. My 1998 Ford expedition has a surging idle when topped or in park. When idling, the engine runs without any loads except the engine accessories. Here's the issue: Warm idle, in park, it will start to surge after about 30 seconds. Joined Apr 29, 2006 · 1,893 Posts. Next play with the high-speed needle, but always back it out from the setting about 1/4 turn or so, from where it runs the smoothest. Tear it apart and clean. The idle motor it self has quite a bit of delay to get the mass of the motor internals moving. I have a 2008 Columbia that has just started surging during idling. As of late, it's become irregular at idle, generally dying unless given some revs every so often, and will surge when in low. 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. Note: If you unplug the IAC and the engine stalls, then you know the idle rpm was probably too low. While on cruise control at 60MPH everything is fine untill you start up a mild to moderate grade and the RPM's start surging from 2000 to 1500 back and fourth and the vehicle starts bucking but if yuo take the car out of drive into third the problem stops with the higher RPM's. That engine is designed to turn at a spicific rpm. My 1998 Ford expedition has a surging idle when topped or in park. The problem turned out to be ethanol gas causing buildup the computer gets confused and surges the engine. When at idle, it surges from around 700 RPM up to 1500 RPM. 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. After I bumped the pilot richer to a 50, the problem of surging was eliminated. 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. Tried all that. I am trying to tune out a hesitation in the off idle part throttle range. 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. Only happens at these low speeds which is right around 800-1000 RPM, just barely above 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). My idle surge is so bad that sometimes when I'm making very tight turns at a slow speed, and in neutral or with clutch in, the engine will just die. It sounds like the torque converter is locking and unlocking again and again. I have class tomorrow. It then jumps back up to about 750, but idles rough. A misfire may occur when your engine is idling, causing a rough or uneven idle. 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. 4 engine diagram, 2000 ford f150 5. 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. 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. This is what I am experiencing. You may have to register before you can post: click the register link above to proceed. Feels like someone is on/off/on/off/on the gas pedal. 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. 2005 Ford F150 stalls at idle and surges Recently we came across a 2005 Ford F150 with a 5. I found an electrical connector disconnected down close to the pre cat O2 sensor but I. The spring on the original bolt was long and thin and it required turning in considerably (after making first contact with the rack). (44-46v) on cold start up. That makes sense about the idle circuit. I too had my steering column rebuilt, now my :ford: 7. This time, it idles just fine until the temp gauge is almost to the middle of the gauge. So no biggy, just no power until that tank was gone. if the idle speed is above that point then the engine will surge at "idle" just like you described. Engine surges at idle. Re-timed it to 8* at 1000 rpm, re-set low idle, hooked vacuum back up 3000 rpm 34 * timing. With a cold engine, start the bike and let it run until it reaches normal operating temperature. 7 and the idle started surging the other day. I am working on a 99 C5 with H/C (mid size cam) with Fast 92 and LS2 TB The car runs strong!! I have MAF and VE tables VERY close, and after the car is warm, it runs great. When I arrive, they had it warmed up and ready to go. 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. This is adjusted with the large flat head screw on the back side near the double throttle area. 0 Mustang Tech: 87: Sep 12, 2009. When idling, the engine runs without any loads except the engine accessories. It didn't run well. google it, theres lots of info on yotatech. The engine starts right up, then surges and dies. Symtoms of problem are as follows:- car started perfectly and would run perfectly for up to one mile then would hesitate as if it missed firing on one cylinder. The RPMs and the engine of the 2001 Oldsmobile Alero might surge if there is a problem with the oxygen or fuel sensor. to/2lZ0s38 Click. 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. See attachment for testing. - 1994-1997 Honda Accord. This is what I am experiencing. 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. Briggs 12 HP engine drags [ 2 Answers ] I have a B/S 12 hp 28000 series engine. It can be controlled and reduced by the throttle lever to reduce the rpms. 0 Mustang Tech: 10: Apr 22, 2017: D: Bad Idle Surge on '88 Fox w/Mods: Fox 5. The engine completely stalled one time as I was braking coming off of a freeway off-ramp into a turn. The problem has been occuring intermittently for several years. Pull the carb, pull the idle needle and run a wire through the bleed inlet (on the intake of the carb on the same side as the needle) and through the passage to the idle port after the slide. Mine was coming from the upper intake gasket. How do I correct engine surging? Ok, I have a John Deere LA115 Mower. Engine surging. - Engine rpm surges at idle and at highway speeds. Got my jump than traveled about forty miles plus about half an hour in traffic. Controlled by the idle mixture screws. never installed the new one. Note: If you unplug the IAC and the engine stalls, then you know the idle rpm was probably too low. It can be hard to diagnose when there are multiple issues. chevy forum at Car Dealer Forums; Truck runs great, but recently when the engine comes off the enriching circuit. It runs great under a load and once I get the RPMs up to about 800. Here's what happens: If I'm driving at very, very low speeds (think grocery store or mall parking lot- 5 mph or so) the engine has a "surging" idle to it. Over and over. Anyone have something similar happen. Sometimes it will do it right on cold start for about 30 seconds and then go away and sometimes it will start. It's not letting any air in, so the motor dies as the idle mix is too rich. I went back over it again with the propane and could find no leaks. ) sometimes I can get rid of it, and other times it's right there. It directs air around the closed throttle for engine idling. Eventually it will clogg enough the engine will shut off. About 3 minutes in once it warmed up it started surging and it eventually died. however I repaired the water problem but my idle concerne still exist. In this article, we'll discuss engine idle issues, surging and "hunting" problems. The "1" is the early design. 3 E350 is surging on idle. Not being able to properly seal, this causes the irregular idle and the fluctuations in RPM as your engine idles. this problem started after i found water in the crankcase and on the valvetrain. Ray, "blue smoke" most of the time means its over fueling. You will probably have to crank for 10 or 15 seconds to get it started, but then it should fire. 4 liter engine that was stalling at idle and had a surging condition at lower engine rpms. Mainly when it is warm, like at a stop light or sitting in a drive through. engine idle problem If this is your first visit, be sure to check out the FAQ by clicking the link above. When you start the engine it will idle smooth for about 30 seconds and then start surging. 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. I've had the motor for about a year and it's mostly used for maneuvering around launching ramps and mooring fields, plus it gets laid down on its side for long periods (the correct side at least). Service manager said it created air leak. 4 engine diagram, 2000 ford f150 5. So no biggy, just no power until that tank was gone. One of the most common glitches on the BMW E30 3 Series is an erratic engine idle. 4L 2V – Page 1 in Ford F150 5. I went back over it again with the propane and could find no leaks. engine rpm surging highand low at idle and driving speed. So make sure to check the system as well, if necessary. The fix is great-non perminant takes about 10 minutes and best of all costs little or nothing. No engine codes to date. When you have a restriction, the engine leans out and starts to die, then the. If there is no change, then unplug. I tried leaving the engine idle for at least 30 minutes with the rad cap off to bleed the coolant passages (had alot of paper towel handy) and no go. Could it throw a code without the check engine light turning on?. If a snow thrower engine is not operating as a it did when it was new, then probable causes to this issues are most likely fuel or fuel line related. 01-20-2011, 04:28 PM. 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. Discussion Starter • #1 • Mar 17, 2012. It fluctuates in idle a couple hundred rpm's or so ie: updownupdown etc. 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. After checking and replacing the plugged EGR coolers the engine idle is smoother and power feels better but the surging is still there. Incorrect idle speed settings or fuel mixture adjustments, and malfunctions in the fuel vapor recovery system can upset engine idle capabilities of carbureted engines. For multipoint injected engines, the fuel pressure at idle better be much lower than pressure at wide-open throttle. 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. It doesn't appear to be spinning fast enough so I bench tested the starter. This specific image (Motor Surging Under Acceleration And Rough Idle 5. 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. Could it throw a code without the check engine light turning on?. Sometimes it to the point of it beginning to stall out then it revs back up. An erratic idle can be caused by a vacuum leak, or an idle air control valve. Includes Honda lawnmowers, pressure washers, generators, etc CLICK HERE FOR THE DRILL BIT SET---- https://amzn. Kohler SV600 Engine Surging As winter is winding down, I pulled out the lawn tractor to prepare for some lawn work. 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. The engine sounded good at fast idle, then as the engine slowed the surge returned. As the title says, the engine-Kohler 18hp on my 2000 model year 3184 is surging and then dying at low idle when it warms up after a few minutes. Here's some data I got when the car was idling: Engine speed - 1800-2200 RPM Throttle Position- 6%-8% MAP - 7. I installed a 24v CUMMINS into a FORD and got it to crank but having a strange idling issue with the truck idle surging. I just installed a brand new injection pump in, but it didnt fix my problem. Caused by using the accelerator at the exact same time as starting the engine. Article Number. Once I tapped the gas pedal in gear and the engine died. tapping the accelerator will bring the idle down to normal, but then it will rhythmically rev from less than 1k to above 2k rpms at about 1/sec. My engine has a surge everytime I stop. 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. The engine RPM would flare and lope up and down. When an engine's computer can "hunt" or "surge" at cruising or idle speeds it is searching for program compliance, there is a problem elsewhere in the system. Also I've notice after pressing the gas a few times and warmed up the engine runs rich and dies. Now the idle is very rough with a pronounced 'miss' its like a cylinder just isn't firing and the car is idling around 600 rpm. The car surges at idle hot or cold! the surging starts whenever I get the rpms over 1750 give or take. AGAIN: I get this Surging ONLY when the engine is WARM and at IDLE. chevy forum at Car Dealer Forums; Truck runs great, but recently when the engine comes off the enriching circuit. Engine surge at idle when the heater control is in the defrost position (1991 Ford F-150) When at idle, and the heater -a/c control is in the defrost position, the engine speed will increase from 500 to 700 rpm, then back to 500. It needed head gaskets, timing belt etc. This is what I am experiencing. The engine surges bad enough to shake the entire bus. 2 to assist with my LSX Conversion shop, start ups ,gear changes,ect. Pull the connector off the idle switch. Does not happen all the time and seems to happen after vehicle is warmed up. Make sure all accesories (radio, blower motor, a/c, lights, etc) are off and start the engine. Mazda6 idle surge. A dirty throttle body can keep the PCM from relearning engine idle speed. until started at the 4th place and engine started "surging" at idle speed. The rest of the images show another jet cleaned first, but that didn't fix the issue. It seems to do it more in the summer rather than the winter, but i think it may be coincidence. The dealership recommended cleaning the throttle and replacing the mass air flow sensor. While the car is surging, smell the exhaust (ie. Anyone have something similar happen. 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 video will give you a quick tip on diagnosing this idle surge problem before you start replacing parts. Idles fine, but every 30 seconds to a minute, it will do a quick surge and then go back to regular idle. seems to be working fine. The truck is new, I've only logged 12,000 miles on it. 0 Mustang Tech: 3: Apr 11, 2020: B: Idle Surge On Fox Body: Fox 5. 01-20-2011, 04:28 PM. Make sure all accesories (radio, blower motor, a/c, lights, etc) are off and start the engine. But since I felt like the idle was fine, and it started acting up so randomly, I have no clue what could be wrong with it. When it spins it sounds real rough (whining sound) Connections are tight,. A few months ago, my wonderful wife got me an older jeep (87), and it had a 401 in it. It needed head gaskets, timing belt etc. 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. You drop it in gear, tip in the throttle, and the engine. Fixing a surging engine is usually a matter of cleaning the carburetor. 2L V6 engine. 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). this problem started after i found water in the crankcase and on the valvetrain. 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. 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 know its one of the cheaper made lawn tractors. However, once off idle it would surge and stall. Just because you had Honda mentioned, older Hondas had coolant heated idle speed valve, air valve, that needed to be taken apart and cleaned. 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. Brand new. Since the idle air control valve is supposed to manage the idle speed of the engine, a bad valve will certainly throw that out of whack. Old problem on all engines that use those things. Maybe a small piece of carbon is sticking an injector open a little. i have a 2001 1. First inspect all hoses and fittings then around the carb or throttle body. Surging is when the engine revs change noticeably under constant load and constant throttle (which in theory should result in constant RPM). We dismantled the Nikki carb on a Scag ztr with Kawasaki engine at work today. You saved me a lot of work and I appreciate your description and photos! -K. The car has already been in the shop before for a rough idle but was repeatedly told it was "normal". And to help diagnose I have a video for you since videos should be mandatory for a clean diagnosis IMO. Most computer controlled vehicles rely on the coolant temperature sensor to tell the computer whether the engine is cold and needs a rich mixture. I bought this welder with a surge at idle a slight rpm swing at full rpm. My 87 Bronco has developed an issue on start up whereas the engine will begin to surge and sometimes die. however I repaired the water problem but my idle concerne still exist. The likely cause of your F 350 having an idle surge is due to eaither a bad Injector pressure Regulator or a bad Injector control pressure sensor. 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. Curious as im fighting the rough idle after a steering column rebuild. The check engine light was not on. 0 Mustang Tech: 3: Apr 11, 2020: B: Idle Surge On Fox Body: Fox 5. 9 is cold or warm, sitting in park or in drive at a stop or light, the idle will surge up and down. 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. alrman Senior Member. This 2003 Ford F150 came in with multiple complaints among which were a surging idle, stalling condition and the service engine soon light on. 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. If it is too high, it will cause the surging when the brake is pressed. When you start the engine it will idle smooth for about 30 seconds and then start surging. Decreased idle speed might occur during coasting conditions or in the event of an accidental vacuum leak to. Above idle, at faster engine RPM, there is no time for the cylinder to leak, so no engine misfire. Briggs 12 HP engine drags [ 2 Answers ] I have a B/S 12 hp 28000 series engine. Idle jumps up 50-100 rpm. Lets say for example you filled up with fuel and it takes you 5 minutes before you restart the bike. The high pressure side typically runs at about 500 psi at idle, 1,200 psi at about 3,300 rpm and about 3,600 psi under full-load acceleration. 02-22-1 11/11/02 ^ driveabilit y - surge/rolling idle - gear driven synchronizers - incorrec t install ation - camsh af t position synchronizer (cmp) install ation tool correct application ^ engine - gear driven synchronizers -. hey guys i still have the idle surging problem. Today I got to test the ISC with a meter and pins 1-2, 2-3, 4-5, and 5-6 all measured 29. They changed the throtle plate 2 times Its been 6 months and its doing it again. After you have made the above check, restart the engine and see if the governor now operates correctly. Question type: Maintenance & Repair. 5K A forum for owners of S30 and S130 Datsun Z's 240Z, 260Z, 280Z and 280ZX! Post Reply. Curious as im fighting the rough idle after a steering column rebuild. 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. Here's some data I got when the car was idling: Engine speed - 1800-2200 RPM Throttle Position- 6%-8% MAP - 7. 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. I also replaced the plugs and coil since I was already there. If it's too high, you'll flood the engine (especially at idle). 2012 10 03 11 13 19 612 - YouTube Im runing stock dodge automatic ecu from a 2002 truck and. 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. The next time I stopped the engine would surge between 200rpm and 1200rpm. Re: Duramax LB7 Smokes at idle. I'm not sure about the pump - I suppose if it is varying the load on the engine, it could cause rpms to fluctuate. Eventually it will clogg enough the engine will shut off. It is throwing no codes. 0 Mustang Tech: 3: Apr 11, 2020: B: Idle Surge On Fox Body: Fox 5. The check engine light came on and then the 'service traction control' came on but went off the next time I started it. I have a 2000 Bonneville SSEI with 60,000 miles and I am experiencing a engine surging issue. Even driving off from a stand still ( like a red light ), the engine idle surging causes some minor surging of the transmission and drivetrain and causes the motorhome itself to jerk a very small but perceptible amount. OK Idle Speed Too Low. It runs great, slight surge sometimes at idle and like I said when cruising. First inspect all hoses and fittings then around the carb or throttle body. But if the A/C signal fails to reach the PCM because of a communications glitch between the A/C module and PCM, the PCM may fail to increase idle speed causing the engine to lug or stall. This cycle repeats over and over, causing the engine to die and surge. A fuel filter is very cheap, and takes only a couple of minutes to install. Sometimes it will actually stall… And the fuel-mileage has become VERY poor since this started. When I started it up it runs great but the engine surges from idle to 2000rpm then back to idle every 15 seconds. Electric choke works great, after the choke comes off and the car idles at 800 rpm glass smooth. 1 of 2 Go to page. Asked in Jeep Cherokee What causes surge of jeep Cherokee 4. I have a 2008 Columbia that has just started surging during idling. this probblem started after a bad turbo was changed. You will probably have to crank for 10 or 15 seconds to get it started, but then it should fire. Check your idle. 1998 Nissan Pathfinder 4WD 3. Before the engine is warmed up, the engine control computer is running in open loop with predefined settings. In this article, we'll discuss engine idle issues, surging and "hunting" problems. Newbie Tuner Needs Help With Idle Surge I have since purchased HP tuners 2. mower has been working great for last 4 years with the same original carb. I have a 2008 Columbia that has just started surging during idling. 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. "Ok wierd! I am having the same problem, supper glad I stumbled on to this thread. Only at an idle though. When an engine's computer can "hunt" or "surge" at cruising or idle speeds it is searching for program compliance, there is a problem elsewhere in the system. please helpwhen i first start it it sounds like the secondary air pump makes a weird noise. I can get 20" hg at idle, steady gauge with no fluctuation. I'm thinking it might be the transmission or some other sensor. Sometimes it will do it right on cold start for about 30 seconds and then go away and sometimes it will start. Engine cannot be shut off; Engine does not rev up; Engine misses under load; Engine surges at idle; Excessive Fuel Consumption; Fog-like exhaust in full-load range (white or blue) Incorrect idle or maximum speed; Injection pump runs hot; Low Power; Poor performance or black smoke; Rough idle when engine is warm; Starting Problem. 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. also check to make sure the cold air intake is properly installed and clamps are tight. never installed the new one. The problem has been occuring intermittently for several years. I bought a Honda powered 17 HP Sears Craftsman lawn tractor two years ago. Surging Idle When engine has warmed up, Worse with Air conditioner turned on The Vehicle had been bought to the workshop to find out why the Idle was so erratic, the vehicle had undergone a few repairs already such as new spark plugs, air mass meter and throttlbody clean and reset the idle adaptions. It moves between 2,000 and 3,000 RPM. Sometimes it to the point of it beginning to stall out then it revs back up. Lean Surge Bucking (Solved), Hard Start (Solved), Rough Idle by Bav3. Adjust the throttle stop screw until you have the idle rpm you desire. This 2003 Ford F150 came in with multiple complaints among which were a surging idle, stalling condition and the service engine soon light on. Idles fine, but every 30 seconds to a minute, it will do a quick surge and then go back to regular idle. Engine surging at idle. 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. The valve acts as the idle control when the throttle is in the closed position. In this article, we'll discuss engine idle issues, surging and "hunting" problems. 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. In most cases it is a bad Injector pressure regulator (the orings come apart) Customer reply replied 12 years ago. **do not REV!! If the. automatic 86k mileage When coming to a stop the rpm drops to 500 and feels like it is going to stall. Over time, carbon builds up on the electronic throttle body. Fixed so far. I went back over it again with the propane and could find no leaks. It can be controlled and reduced by the throttle lever to reduce the rpms. Partial Blockage of Main Jet. Mild built n/a LS1. 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. The engine was rebuilt about 25K miles ago and i have receipts for over $6k worth of repairs in hte past 4 years. So make sure to check the system as well, if necessary. It's almost undriveable before the engine warms up and then it's barely sufferable once the engine has warmed up. The motor is a Vert. 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. The shop stated when the TPS was tested (via scan tool) voltage did not fluctuate, it stayed steady. I used to get an rough idle on my old Briggs & Stratton 18 HP lawn tr. As of late, it's become irregular at idle, generally dying unless given some revs every so often, and will surge when in low. 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. Only idle surge ive ever had with mk3 was because of a vacuum leak. If I rev it up a couple times, it clears away and idles properly. What are the highest "possibles" for this? Some. What causes Reduced Engine Power Message, surging idle. 4L (RPOs LUJ, LUV) and 1. Dodge Dakota Engine Problems. Also seen a post in another forum about the idle air control valve, and how cleaning will help. Eventually it will clogg enough the engine will shut off. bandit10-4 · Registered. The engine sounded good at fast idle, then as the engine slowed the surge returned. 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. never installed the new one. 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 dreaded engine surge. Also seen a post in another forum about the idle air control valve, and how cleaning will help. com and I will send it to you. Aug 1, 2017 • FAQ. Unplug the exhaust back pressure sensor while running. Mine does it also. Engine RPM's are from 500 to 1000. even at full throttle no load the engine runs on the idle circuit of the carb. chevy forum at Car Dealer Forums; Truck runs great, but recently when the engine comes off the enriching circuit.


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