Saturn - Sl :: 1997 - RPMs Will Drop By 500 - 1000 Occasionally?

Apr 9, 2014

I have a 1997 Saturn SL1 with 100k. Every so often the RPMs will drop by 500-1000 or so for a second and then come back up to normal. This happens both when stopped at a light and while accelerating, and doesn't seem to happen predictably. I've already changed the filters and cleaned out the IAC, without any success. I've sprayed the obvious connection points in hopes of locating a potential vacuum leak, also without any luck. Other ways to locate a potential vacuum leak that wouldn't be overly time-intensive?

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Saturn :: 1997 - Engine Revs When Stopped / RPMs Go From About 1000 Down To 500 For A Couple Of Seconds

I have a 1997 Saturn, and have noticed for the past couple of months that when the car is idling at a stoplight, the engine seems to rev or almost skip a little bit. The RPMs go from about 1000 down to 500 for a couple of seconds, and this will happen once every 10 seconds or so. Otherwise, it runs fine...but this is happening more and more frequently than it used to.

I had the transmission rebuilt over the summer and its still under warranty. What might be causing this?

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Suburban :: 2003 - Reduced Engine Power / RPMs Drop To Below 1000

IOur 2003 suburban often gets a "reduced engine power" displayed by the computer and the RPMs drop to below 1,000. The vehicle will not accelerate and will not go above 1,200 RPMs no matter how much gas it is getting. Flooring the gas pedal has absolutely no effect and the truck continues on its merry way at about 20 miles per hour.

I have been told by various amateurs that it is the gas lines or electronics that regulate the gas flow. The reduction in engine power seems to happen randomly, but most often if the vehicle is idling for too long (and I'm sure the 110 degree heat doesn't work). I can get it fixed much quicker if I know what the problem may be.

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Saturn - SL2 :: 1999 - Engine Rev Up To About 2000 RPMs While At A Stop Then Drop Down To About 650

My '99 Saturn SL2 has from time to time in the past year or so had brief bouts where the engine will suddenly rev up to about 2000rpms while at a stop and/or drop down to about 650rpms combined with surging and stalling while moving. The Service Engine light would typically come on in conjunction with these spells, but then a few days later, things would be back to normal and the light would go off. The episodes seem to correspond with weather that has high humidity, but not necessarily extreme heat. Once or twice when the heat was above 90, the car quit completely and wouldn't restart for several minutes, but that was last summer.

About a month ago the car, which is normally parked in a garage, spent the whole weekend outside when we had some extreme rains (in air temps only about 60s or so). Since that weekend, the car is running frequently with the issues previously described, especially the surging and stalling while driving. It will feel like the timing of the fuel is all out of whack, will shudder and run hard, and then it will suddenly correct itself and run normally. A friend has a code reader and the codes that came up are 404 and 1404, which indicate the EGR valve. We replaced that with a new one and put in 4 new spark plugs, but the problem still persists. I believe the fuel pump is in the gas tank, so from other things I've read, a vapor lock may not be the problem since the fuel is being pushed.

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Ford F-150 - 1997-2003 :: 2002 - 1000 RPMs At Stop Sign And Clunk Sound

My 2002 F-150 with the 5.4 has an issue with a high rev (1000 RPM for a few seconds) while at a stop sign, along with a clunking/banging sound coming from under the truck. This is when I have the brake mashed all the way, and this all happens at the same time, almost every time I come to a stop at a stop sign or light. I do have an intake manifold leak, which i have recently determined, but I do not know if the high rev at a stop sign has to do with the manifold leak or to do with the transmission sounding thump I hear. Could this be a torque converter not unlocking, and then suddenly unlocking? Because after the thump sound, the RPM's go down to around 650 from 1000 every time.

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Ford F-150 - 1997-2003 :: RPMs Drop To 330 While Braking

Two weeks ago Sun, truck ran fine, however Mon morning all hell broke loose. Truck was running very sluggish and stalling while coming to a stop. My first thought was tune up. I replaced the plugs and wires. During this I found that i could not get a socket around the ever loved driver side rear plug so i was only able to replace 7 plugs however in that process i managed to break the metal coolant tube that runs to the heater core.

Aday later replaced the entire intake manifold,egr valve, egr tube, IAC valve, both coil packs, fuel filter, tranny fluid and filter. During the removal of the intake i looked at the rear spark plug and found that a screw had been wedged into the hole breaking the plug and got it changed now it is all back together and the truck runs amazing however did not solve the low rpms during stopping. ive replace the above and checked fuel pressure which is good.

I have a TPS sensor just haven't installed it yet not sure if it is related to the issue. Tranny guy says it may be a bad solenoid or TC however last night I reset the PCM and drove it it ran flawless. this morning the problem returned which leads me to believe its not the tranny. ok one last kicker that 6 experts have failed to answer when i manually put the truck into 2nd gear the engine dies! no studder no fighting just quits.

Truck is a 98 F150 4.6 V8 186,000 miles i have yet to

1) change TPS.
2) clean throttle body.
3) clean MAF sensor. n

Not sure if any of this has an effect on the issue. There is only a EGR insufficient Air flow code..

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Ford :: 1997 - Engine Disengages RPMs Drop Below Idle

Twice now this has happened to me and I'm concerned it will become worse if I don't fix it. Driving down the road my engine has disengaged. By this I mean the vehicle both times has been at 55 MPH, my foot on the throttle rpms riding around 1300 revolutions, and the engine disengages rpms drop below idle and my "wait to start" light comes on. This both times lasts approximately 2 seconds and throttle reengages while still traveling 55 MPH, "wait to start" light goes off and its like it never happened. What's going on with my truck? Ford diesel 97 250 7.3 ...

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Ford F-150 - 1997-2003 :: RPMs Drop / Surges Over Bumps Only - CEL Flashes On

So I know there has been lots of posts on surging issues and how to troubleshoot. My truck is a 97 f150 4x4 xlt 4.6l v8. I have noticing surging and dropping in my RPMs lately. No CEL. I have kept a journal when I notice when it happens. I only have issues when I am driving around 40-50 mph and if I go over bumps/pot holes/rough spots in roads or when I'm braking over bumps/pot holes/rough spots, my truck surges/RPMs drop CEL flashes on and off only during these instances. Makes me think something could be loose or something causing this. It has stalled at times when having to brake fast (yellow light, etc.). Where to look first? 1997 F150 4x4 4.6 V8...

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Ford F-150 - 1997-2003 :: Truck Stumbles - RPMs Drop When In Gear

I have a 1997 forkd F150 with a 4.6L Romeo engine. I have recently rebuilt the engine and now since it is put back together I am having a issues that i cannot pin point. When the truck is running and in gear my RPM drop to around 500 or below and my oil pressure drops and comes back up when the rpm's come back up this an intermittent problem and I have replaced the IAC valve and every once in a while i get a P0401 code for the exhaust recirculation. I think I am loosing some kind of vacuum. It was not doing this when I tore into the truck. It seems to be running okay not hesitation.

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Audi A4 :: 1997 Stalling - When Started Up And Left To Idle All Of A Sudden RPMs Drop

I have a 1997 Audi A4 that has been acting a little bit strange lately. When it is started up and left to idle all of a sudden the RPMs drop from around 600-800 to 100-200 sometimes rebounding back up and sometimes the car just dies. This also is happening while I am driving and stopped at a stop light for a short time. It will idle fine then suddenly drop RPMs and if I don't give it any gas then the car usually dies. I have just had some work done on it to try and fix this problem thinking it was the air flow sensor (or something like that) but apparently that is not the case.

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Elantra MD (2010-15) :: Acceleration Drop To 1000 / 1500 RPM Very Rapidly When Gear Shifts In 2nd

I have only done 18,000 Kms on my 2013 Elantra GLS. Whenever I am in traffic driving real slow, and whenever the gear shifts in 2nd, the acceleration begins to drop to 1000/1500 RPM very rapidly while pressing and releasing the pedal, and it becomes jerky...

I will try posting a video, but meanwhile, it gets really annoying at times and I need to maintain a very feather foot to make sure it doesn't jerk especially when there are passengers on board..

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Tiguan :: High Idle (1000 RPMs) With AC On?

2012 SEL... Experiencing High Idle (1000 rpms) when the AC is ON. When I power the AC system OFF... the idle comes down to 700-800rpms. Then I power the AC back ON and it stays for the rest of my trip. Restart the car, and it's back to 1000 rpms with the AC on.

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Bmw - 325 :: Occasional Surging Idle / Engine Will Rev Between 500 And 1000 RPMs

My 2001 BMW 325Ci has an occasional "surging" idle problem. When coming to a stop or at idle, the engine will rev between 500 and 1000 rpm's. Sometimes it will correct the problem and idle normally, or keeps surging until it eventually stalls. When restarted it works fine. Tried fuel injector treatment, fuel stabilizer treatment, and replaced thermostat. Still surges about 50% of the time. Had it to a dealer, and computer says its running fine.

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Honda - Cr-v :: Runs Rough Only Between 1000 To 2000 RPMs

Reconditioned engine 5,000 miles ago. Last maintenance check at dealer found nothing wrong. 2000 Honda CRV.

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GTI 337/20th Anniversary :: Idle Fluctuates From Almost Stalling To 1000 RPMs

I have a pretty bad flex pipe leak on my 20th. Would this leak cause a very rough idle almost stalling when I come to a complete stop. The Idle fluctuates from almost stalling to 1000rpms.

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Chrysler - 300C :: 2005 - Hesitation Between 1000 And 2000 RPMs

I have a 2005 Chrysler 300C ( original owner )Mileage 172,000 and I take care of my car. I use full synthetic oil and change it every 5000 miles. I noticed a hesitation between 1000 and 2000 RPM's. It disappears after 2000 RPM's. The Chrysler dealer kept doing repairs and claimed the problem was gone and it is still there. The dealer did a full tune up, induction service and also replaced the EGR valve, gasket and seal. The problem gets worse in higher mountain altitudes.

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Golf IV / Jetta IV :: 2000 GLS Idles Around 1000 RPMs When Started

So lately my 2000 Jetta GLS hasn't been running that smooth I can tell when I'm changing gearing and when I start the car and the car idles around 1000 RPMs. I think it may be the engine miss firing because some times I can feel the car shaking but I have no check engine light. Lucky... Also the coolant is leaking idk what the exact problem is but everywhere I go there is a puddle of coolant under my car.

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Corolla / Matrix 2009-13 :: 2011 - Idling At 1000 RPMs - Too High?

Noticed this morning I was idling at 1000 rpms and was wondering if that's normal or a little high?

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Corolla / Matrix 2009-13 :: Ticking Noise Under 1000 RPMs When Car Is Idling

I have a 2009 Corolla and anytime the car is idling and it drops below 1000 RPMS there is an extremely annoying ticking sound, it goes away when I put it in Neutral or the AC is on because it idles higher.

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GTI 337/20th Anniversary :: 2005 - Shake And Idle Hard When Gets Under 1000 RPMs

I have a 05 gli I just put a k04 turbo on. It runs on stock ecu but I have been told that's not the problem. When I start the car the rpm's spike to around 3 grand then slowly drop to normal idle rpm's when it gets under 1000 rpms the car starts to shake and idle hard. Idk what it is Cel is on and read misfires in 3 of 4 cylinders but checked plugs and everything they r fine. I'm thinking maybe vacuum leak or something along those lines.

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Honda - Cr-v :: Rough Vibration / Shuddering / Chattering When RPMs Between 1000 - 2000

I leased a 2015 Honda CR-V AWD LX on March 11, 2015. The following day I noticed a rough vibration/shuddering/chattering that appeared to be coming from the transmission when the rpms ranged between 1,000 and 2,000. The roughness was evident at any speed (mpgs) when the tachometer reading was between the previously stated range. The service technician reported feeling the same roughness, but noted that the problem was characteristic of the CRV with a CVT transmission. On Tuesday March 17, I went back to the dealer and discussed the problem with the service manager. He also stated that he was aware of that particular problem and that it was peculiar to the 2015 CRV with the CVT transmission. He took my car for a test drive and admitted feeling the chattering. It was also evident to me as I sat in the passenger’s seat. He then took out another new CRV and it too exhibited the same characteristics.

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