Question about 1988 Jeep Cherokee

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1988 Jeep Cherokee 5 liter motor straight 6. Runs one day, and then the next day, no power to the spark plugs. It seems to have a mind of its own. Even while driving, it seems to lose power to the spark plugs. The ignition is going on and off whenever it feels like it, even while driving. There is fuel getting to the engine, but no spark. Fixed so far... tune-up, new parts include (distributor cap, rotor, plug leads, plugs, modulator, coil, distributor cap wire harness, router. Basically most of the ignition controls. None of the sensors have been changed. What else could be causing this?

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  • s_weaver
    s_weaver Jul 23, 2009

    You are the man Turbo... That would be about right, key regularly does not turn all the way off without coaxing and ignition is wiggly! Going to replace that ... if that don't work... maybe sensors? Hair raising experience on the highway last night when my baby started cutting out.

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At the age of you Jeep I would be looking at a worn ignition switch (The part that turns when you turn the key).They wear out causing a very intermitant connection some times it works and some times it doesn't ,Going over a small bump in the road is often enough to break the connection causing the engine to stop.
Start the engine and try gently wiggling the key and see if it dies.....
Hope this helps.

Posted on Jul 21, 2009

  • George Jul 23, 2009

    I dont think that your problem will be any of the sensors , Do the switch first and see how that goes.
    Most sensor faults cause the engine light to come on and stay on .......
    If you do need anymore help just let me know.
    Regards
    George


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