1990 Jeep Cherokee hard starting issues

Discussion in 'General Motoring' started by Jeep Guy, Aug 24, 2007.

  1. Jeep Guy

    Jeep Guy Guest

    Hi, I have a little starting problem and running rough problem, but
    the issue is weird, what happens is sometimes my Jeep will not start,
    engine turns over, but won't fire up. I fiddled around under the hood
    one day and twisted the injectors and the Jeep started! So I figured
    it was the O-Ring seals, I replaced them and didn't have any problems
    for a week or two, then it started all over again. Sometimes I can go
    weeks without having this problem, sometimes I have to twist the
    injectors everyday, specially when the Jeep has been sitting for a
    while, usually an hour or so...

    Also, sometimes my Jeep will run really rough and idle rough for a few
    weeks then suddenly I can start it up and it will run smooth, usually
    lasts a few weeks, then back to rough again, I cannot afford to have
    it hooked to a diagnostic scope, so I am wondering if you may know
    what could be causing either of these issues, Map Sensor? Cam Position
    Sensor? Crankshaft Pos. Sensor? Etc???

    Thanks for any help with this...
    Jeep Guy, Aug 24, 2007
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