Question about 1993 Ford Explorer Limited

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1993 Ford Explorer idles rough when engine is warm

My Ford Explorer idles rough when the engine is warm. The spark plugs, wires, and fuel filter have been replaced. A compression test yielded 150 per cylinder. The rough idling is somewhat intermitent. The engine seems to run smoother with higher rpm. Any ideas?

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  • bigmac1226 Feb 06, 2009

    The only thing that was done to this 1993 ford explorer was change the spark plugs, wires and fuel filter, PCV  and a grommet. 



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You might want to check your fuel injectors or your O2 sensors there are 2 of them 1 on each side of the block located on the pipes coming from the exhaust manifold

Posted on Apr 21, 2009

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Try changing distributor cap & coil

Posted on Jan 06, 2009


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Why a 2002 ford explorer idles rough?

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.

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