Question about 1987 Jeep Comanche

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1987 jeep comanche with4.0 will crank but wont idle i have already changed tps and idle air control valve and checked fuel pump and changed fuel filter and checked vacume lines with no change what else could it be also had throttle body cleaned

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Have you checked the crank position sensor? when this baby goes the engine will start and run for one or two seconds then die like its out of gas.

Also the ignition switch may be suspect.

Posted on Oct 14, 2010

  • cheap repair Oct 14, 2010

    after re-reading your post I thought a sticking EGR or PCV valve may be a cause if you can keep the engine running by using the throttle.

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