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  1. 1

    Running Problems

    It uses 2. The downstream one, behind the cat, compares to the upstream one to check the cat is working properly. I have swapped those out and tried a few other things with them. Most of all the grounds are at least 10 ga other than the engine to chassis and engine to body which is braided cable.
  2. 1

    Running Problems

    I have installed a 4.0L from a 96 XJ into my 86 CJ. (Its OK, I own 2 XJs also, no jokes please) It seems to run good with plenty of power but has a problem with a miss at all RPM's. The computer code (p0171) says it is sensing a lean mixture and is overcompensating and running rich. I have...
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