Question about 1990 Cadillac Deville

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Car has not been started for several months. Now runs ruff

After sitting for several months the car will stall out and seems to be missing. Idle speed is low. Plugs were black with unburnt fuel. After cleaning and gaping plugs car ran better for a little while. Nows it is running bad again.

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Spunds like the car needs a whole tune-up. Plugs, wires, fuel filter, and definately an oil change. Also, you may want to make sure the car is properly timed. If it isn't, that will cause uneven running, with carbon and/or oil build-up on the plugs.

Posted on Aug 27, 2008

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If you let truck idle for a while it will stall and once again must let it sit for a few minutes and it will start.


How to Fix a Car That Stalls: 7 Steps (with Pictures) - wikiHow

www.wikihow.com > ... > Cars > Car Maintenance and RepairwikiHowFortunately, this usually does not signal a major repair to your vehicle, and it cangenerally be ... Does the car idle roughly and stall when at idle? .... has been running for a while, the fuel pump may overheat and stop working, stalling the car.

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Car runs perfect then starts missing real bad then stalls


Not unusual for fuel pumps to begin to fail once they are heated up from running. First thing in the morning pump is cool, then as you drive, it heats up and begins to lose pressure. After sitting a 1/2hr-1hr, it may start again and run fine for a short time and start to act up again. Had similar problem and found good fuel pressure when tank and pump cool, but lost pressure once vehicle driven a distance and pump heated up. The hotter the weather, the shorter the distance I could drive. If you can somehow set it up to have fuel pressure checked when it starts to act up, that would certainly help confirm if fuel pressure is the culprit.

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REPLACED THE EGR VACUUM SOLENOID NOW IDLES RUFF AND RPM GO UP AND DOWN AT IDLE


It can be issue with IAC( idle air control valve) causing the problem.

There are many other possibilities causing these idle issues.Engine idles rough.There are few help links with solutions to troubleshoot such idle issues.
I suggest you refer the link below and follow its troubleshooting details:------Click the link below:-----Bad miss at idle? http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html
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Stumbling and stalling at idle after engine rebuild? http://schematicsdiagram.blogspot.in/2012/03/stumbling-and-stalling-at-idle-after.html

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1999 Ford F-150 Idles rough and quits when gas pedal is pressed less? http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html

--------- Engine stumbles coming off idle when warm?

http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html

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Erratic idle on car?

http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html

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Cold start problem and vehicle shudder around 2500 to 3500 rpms
http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html
---------- Low idle when cold out side?

http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

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GMC Sonoma Stalls and idles low http://technoanswers.blogspot.com/2012/10/gmc-sonoma-stalls-and-idles-low.html
--------


GMC Idle Air Control (IAC) Valve Replacing?

http://schematicsdiagram.blogspot.com/2011/12/gmc-idle-air-control-iac-valve.html

-------------
1996 Camry intermittent engine failure while idle?

http://repairhelpcenter.blogspot.com/2011/10/1996-camry-intermittent-engine-failure.html

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Engine quits at idle?

http://repairhelpcenter.blogspot.com/2011/10/engine-quits-at-idle.html

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Car overheats and Air blows hot at idle?

http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

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High Idle Problem
http://repairhelpcenter.blogspot.com/2012/10/high-idle-problem.html
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While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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Idle flair is noticed on car? Rough idle? car will not idle? Erratic idle speed?

http://technoanswers.blogspot.in/2012/02/idle-flair-is-noticed-on-car-rough-idle.html

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High rpm in neutral? Inconsistant high RPM in neutral?

http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html

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Vehicle stumbling at idle and shows code 54?

http://schematicsdiagram.blogspot.in/2012/03/vehicle-stumbling-at-idle-and-shows.html

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Rough idle, staling and Erratic shifting? http://technoanswers.blogspot.in/2012/03/rough-idlestaling-and-erratic-shifting.html
-----------While stop engine idles like cylinder missing? http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html
---------These details will help.Thanks.

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2 Answers

I have a 1994 Park Avenue that was owned by an elderly woman. Vehicle has ~99000 miles on it. Overall problem is random sputtering, loss of engine power at idle or between stop & go traffic. I have...


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1 Answer

My 1988 chevy sprint runs rough when i start it then idles at about 2000 rpm after several minutes and stays at that high idle. i have tried to fix it several times with arebuilt carburetor new plugs cap...


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2 Answers

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1 Answer

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Check for vacuum leaks. Also try cleaning the ISV.


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1999 dodge stratus


Try removing your A.I.S. (automatic idle speed) motor, and clean the plunger, and port that the plunger goes into with throttle body cleaner or similar. Quite often this gets gummed up & sticky and will cause it to stall or idle down real low, especially when a load on engine, such as AC on, turning, etc. The purpose of this part is to step-up the idle, automatically when those conditions occur. If it shows improvement, for a while, then starts doing it again, I'd put a new one on.

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