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  1. J

    1990 4.2 no spark, tried everything but I ignition switch

    I really am stuck. It sparks a little before and after i turn the ignition. No spark while cranking. Just a little when i stop cranking. New everything but the ignition switch. im stuck. Any help would be great.
  2. J

    1990 YJ 4.2 sometimes sparks and runs some time not.

    1990 yj. Did a 4.2 nutter bypass, 2100 carb, new distributor cap, pickup. fires sometimes. I have driven it. Most no fire. I put a different ECM and it seems more sensitive to some issue with it sparking. When it runs it runs great. i cant see a crank position sensor anywhere. I bought...
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