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Why a 2002 ford explorer idles rough? - Cars & Trucks

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Several things can cause rough idle on a Ford.

Check all vacuum hoses for, first of all, that they are there, and then that they have not been chewed by mice or squirrels (that happens), or rotted away (that happens too).

Check the coil pack(s) for corrosion at spark plug terminals, check plug wires--at night, the darker the better, raise hood with engine running; blue sparks or lightning jumping around the wires and plugs means your wires are dead--check plugs for fouling or tip wear, if your car has over 100,000 miles check catalytic converter and fuel filter, and check the TPS. The throttle position sensor monitors where the gas pedal is, and since most of the time, it is at the place that makes the car go 55, or idle, the TPS can get worn in those positions and send false signals to the PCM. Fords of that vintage also used a pulsed air feeder that can cause rough idle and is very difficult to service.

Best bet is vacuum leak first, then spark, then fuel, then the out-there stuff.

Posted on May 07, 2014

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6ya6ya
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Posted on Jan 02, 2017

  • 43 Answers

SOURCE: 1993 Ford Explorer idles rough when engine is warm

try changing distributor cap & coil

Posted on Jan 06, 2009

  • 1 Answer

SOURCE: 2002 ford explorer

I would say its your Idle air control valve. Clean your air filter too.

Posted on Feb 07, 2009

chuck943
  • 783 Answers

SOURCE: 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

Posted on Feb 11, 2009

junkman1249
  • 552 Answers

SOURCE: exhaust blows black on ford explorer

look for a vacume leak. black smoke means it is running very rich

Posted on Mar 29, 2009

  • 58 Answers

SOURCE: My 2002 ford explorer v-6 dies at idle. No

throttle position sensor

Posted on Jul 05, 2009

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1 Answer

What would cause it to idle rough


MANY THINGS CAN CAUSE IT TI RUN ROUGH. IS YOUR CHECK ENGINE LIGHT ON? IF IT IS GO TO AUTO PARTS STORE HAVE THEM RUN A SCAN ON THE CAR AND IT WILL TELL YOU WHAT TO LOOK AT TO SOLVE THE PROBLEM. THINGS THAT CAN CAUSE A ROUGH IDLE: BAD PLUGS, BAD COIL PACKS, VACUUM LEAK, BAD CAM SENSOR,BAD PLUG WIRES, TO NAME A FEW.

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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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