Question about 1991 Chevrolet Cavalier

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91 caviler running on 2 cylinders just changed plugs and wires , was having a backfire on heavy acceleration

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If the two dead cylinders are close together,then the head gasket may have blown out in between them.See if the timing has jumped.If it has a coil pack,the the coil pack may not be firing the two dead cylinders.

Posted on Nov 20, 2009

  • Robert Dietrich
    Robert Dietrich Dec 03, 2010

    i am having the same problem. but it started as my cylinders 1and4. i replaces the coil packs, it ran fine, then had the problem again. i then replaced the crank sensor and it ran fine. tehn its stopped running. i replaced the wires, it didnt do anything. the i replaced the igntion conrtol module and my car ran fine. now my cylinders 2and3 wont fire. they keep coming firing, then not working at all leavin 1 and 4 to run the car. any idea what the problem would be? and the coil packs tested fine. i even swapped them and the cylinders that were not working still did not work.


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