1. #1
    allthings_offroad's Avatar
    allthings_offroad is offline Junior Member
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    1997 Jeep grand charokee

    My 97 4.0 runs like itís cammed but itís not itís got a new fuel pump head gasket idle air control sensor tps and map sensor and all new fuel injectors and fuel rail and new ecm still runs the same it idles at 2k and jumps down and up need help been trying stuff for 3 months


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  2. #2
    TerryMason's Avatar
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    Re: 1997 Jeep grand charokee

    Does the computer show any codes?
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  3. #3
    JPNinPA's Avatar
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    1997 Jeep grand charokee

    High idle is often intake/vacuum leak. Did the intake seat correctly? Everything hooked up properly?
    Take a can of carb cleaner and spray around the head gasket, And every intake to head connection. All intake vac ports. And vac lines esp the one that goes the the vac reservoir under the battery.


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    JPNinPA

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    Last edited by JPNinPA; 12-03-2019 at 08:52 AM.
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  4. #4
    allthings_offroad's Avatar
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    Re: 1997 Jeep grand charokee

    Okay Iíll check


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  5. #5
    allthings_offroad's Avatar
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    Re: 1997 Jeep grand charokee

    Quote Originally Posted by TerryMason View Post
    Does the computer show any codes?
    No


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