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Mercedes 300se 1989 MB se idle rough when stop at light. Runs fine at speed but will not idle. When i finally start it runs fine at high rpm.Has new plugs, wires, fuel filter help

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Check the brake booster for leaking diaphram or faulty valves.. Remove the vacuum hose and plug it off then start the car and see it it idles ok then put your foot on the brake. If it still idles ok then the booster needs replacement/repair.

Posted on Aug 08, 2013

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Posted on Jan 02, 2017

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2003 Kia Sedona what is the RPM supposed to idle aton cold start an in warm weather


Idle speed depends on a number of factors; for instance it may idle faster when the air conditioner is on. Instead of a fixed idle speed, as in the old cars, the engine computer sets the speed to whatever is needed to run any accessories and maintain smooth operation, but generally not more than that. That's under normal circumstances. There are several failure modes that cause erratic idle speed; usually the engine will also run roughly.

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93 3003 MERCEDES 2.8 DIDNT PASS SMOG NO CHECK ENG LIGHT ON SMOG GUY SAID EGR STUCK IDILES A LITTLE ROUGH BUT RUNS GOOD AT HIGH SPEEDS WHAT DO I DO?


run the fault codes to ensure that the EGR valve is faulty. Engine lights to not always come on unless there is something drastic going on with the engine /gearbox so that you can stop the car before damage is done.

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1 Answer

92 NISSAN WITH BOGGING AT 2800 3500 RPM AND AT LEVEL SPEED 4CYL AND 5 SPEED


For this types of problem,there are few help inks to troubleshoot the problem.Click the link below to go through the troubleshooting procedure to resolve the issues :----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-----------van idles rough? http://howtobyme.blogspot.in/2012/01/2004-ford-freestar-van-idles-rough.html
--------------runs lean and idles rough? http://technoanswers.blogspot.in/2012/02/ford-runs-lean-and-idles-rough.html
-----------Car still runs Rough after tune up? http://howtobyme.blogspot.com/2011/12/car-still-runs-rough-after-tune-up.html
------------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
----------High rpm in neutral? Inconsistant high RPM in neutral? http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html
------------Engine Backfires? http://technoanswers.blogspot.in/2012/02/jeep-backfires.html----------- Nissan stalls and bucks on Acceleration?

http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

-----------
Nissan Pathfinder Backfires? http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-backfires.html
---------How to adjust rpm? http://schematicsdiagram.blogspot.com/2011/12/how-to-adjust-rpm-on-2009-dodge-charger.html
------------Engine cuts out at 3000 RPM? http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html
----------This will help.Thanks.

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Extremely high idle speeds develped overnight


check idle speed control make your throttle valves not stuck.check for vacuum leak around the throttle body area look for broke gasket.

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1989 350 runs rough for a while after ineling


have the converter checked it may be partially clogged

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1 Answer

1989 honda prelude enigne idles high then low irratic


I had the same problem on a Rover. There was a leak in inlet manifold that was caussing the problem.
To verify, spray some sealant to temporarily seal the inlet manifold .and the eratic idling should disappear for some time.
If it does, you know there is leak in inlet manifold which you can take of and refit with a new gasket.

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2 Answers

1989 Reliant K running poorly


my reliant (89) idles very high when you start it, then settles
down, but while driving it starts to chug very bad. I have new plugs, wires, distribitor cap and rotary button. How do I fix it??

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