Question about 1988 Jeep Cherokee

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My 1988 Jeep Cherokee 4.0L died on me coming home from work. I have no spark at the spark plugs. I have replaced the coil/control module assembly with a used unit as well as the camshaft position sensor/distributor assembly with no change. I have checked for battery B pos and ignition B pos as well as both grounds at the ECU all are present. Is the ECU the culprit? I'm not exactly clear on the function of the ignition control module function in relation to the ECU. Can you help? Thanks.

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I am experincing the same problems with my 1988 jeep Cherokee 4.0. It died coming home one day,I replaced the motor and it turns over but gets no fire. I have repaced the control module, and distributor brand new my coil is testing good. I am wondering if it is my ECU also. The plug coming off distributor has one wire showing bright on test light, and one showing a dim light on test light and was wondering if you have checked these wires? Trying to figure out what will make these both shine bright.

Posted on Nov 27, 2010


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