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My ford explorer runs rough at idle when the engine is warmed. RPM fluctuates +/- 400 prm on average

I have a 2002 Ford Explorer that runs rough at Idle (and has stalled 3 times while stopped) -once the engine is warm. It does not occur after starting, but only happens after the engie is warmed, especially after driving for a long distance. The RPM fluctuates as much as +/- 400 RPM or less. It has very high mileage, but until recently has run smooth.

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SOURCE: Engine Runs Rough at Idle

go to auto zone,its free ck.throtle senser

Posted on Feb 19, 2012

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I have Ford explorer 2002 XLT 6 cylinder , its rpm is 1000, how can i reduce the rpm to 600, because when i engage the back gear it gives problem.

Hi I'm AL the owner of Big As Auto Repair

I'm glad to help!

One of the biggest reasons an engine idles to high is because of vacuum leaks. Check all the hoses for cracks and while looking listen very close for the vacuum leak it will be a hissing sound. For further assistance visit my website below. Have an awesome day! Auto Repair

Mar 03, 2015 | 2002 Ford Explorer

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No such thing as a tune-up

All you did was replace spark plugs which should be
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Oxygen Sensors get replaced at 100,000 miles which you
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You most likely have an intake gasket leak,smoke test
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You also are have bad igniton coils

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95 ford explorer idles for a few minutes then shuts off. Only when the engine is cold. When it is warm it dosent do it.

Engine stalls cold or RPM fluctuates at idle up and down or dies near idle.

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control

Oct 18, 2012 | 1995 Ford Explorer

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Engine Runs Rough at Idle

go to auto zone,its free ck.throtle senser

Feb 19, 2012 | 2002 Ford Explorer

1 Answer


Sounds like EGR Valve sticking in the open position.Take valve off and try cleaning it with a non-chlronated brake cleaner or replace it.

Jul 12, 2011 | 2007 Ford Explorer Eddie Bauer

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2000 Ford Explorerer rough idle When cold

what codes are present? If it is lean codes P0171/P0174 problem is most likely the orings leaking between upper and lower intake manifold if this is a 4.0L

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2002 ford explorer

I am guessing here w/o much info, 1 of maybe 4 things, idle speed contoller motor, low fuel pressure, dirty air filter, or lastly, carbon buildup on the throttle body throat. When cold idle the carbon blocks off the little needed air and the engines will run rough or just die.

Aug 26, 2008 | 2002 Ford Explorer

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