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  1. X

    O2 sensor or CPU

    I have a 96 4.0 auto that runs good but will not pass smog check. Emmisions are excellent but it fails the OBD check. It does not have any codes in memory but it does not complete all it's self diagnosis checks. I have hooked up a scanner and watched it complete all but the HEGO sensor check. I...
  2. X

    Questions about XJ in snow and cold

    I have some newbie questions about dealing with snow and cold weather. I am forced to go on a trip to an area where snow and cold wheather could be counted on. I have never driven a 4wd on roads with snow on them. My first question is under what weather conditions should I shift into 4wd? Should...
  3. X

    Failing California emissions test

    I have a 96 4.0 that is running really well and passes the actual emissions part of the test perfectly. The problem is that it fails the test because of the OBD part of the test. The O2 heater sensor never completes it's own self test. In other words the IM readiness test is never complete. I...
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