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Why does the idle on my 2001 Jeep Grand Cherokee 4.7 V8 Fluctuate up and down ?

4 Answers

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  • 1 decade ago
    Favorite Answer

    Could also be a bad MAF air sensor and the computer is trying to find the connection

  • 1 decade ago

    also check for a vacuum leak on the engine, or a loose fitting on the throttle body.

  • 1 decade ago

    dirty fuel system maybe try a bottle of fuel treatment

    maybe replace fuel filter

    maybe have fuel system flushed

    replace air filter tune up

  • 1 decade ago

    dirty IACV.

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