Is your N* running bad, hesitating, missing??
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Northstar Engines and System Technical Discussion Discussion, Is your N* running bad, hesitating, missing?? in Cadillac Engine Technical Discussion; FYI - last year my 94 STS starting running bad, hesitating and misfiring out of no were, I replaced everything: ...
  1. #1
    Rick94STS's Avatar
    Rick94STS is offline Cadillac Owners Member
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    Is your N* running bad, hesitating, missing??

    FYI - last year my 94 STS starting running bad, hesitating and misfiring out of no were, I replaced everything: PCM, plugs, wires, O2 sensors, oil & filter, air filter etc..... Nothing I did helped!!
    My mechanic scanned it and came up with nothing useful. He did suggest to try replacing the fuel pressure regulator. As i was beginning to dismantle the top of the intake to get to the regulator I found my fuel injector harness had melted on the top of the trans housing causing two injector wires to short against the trans (ground). I repaired the melted wire harness and tie wrapped it up away from the trans.
    The Car has been running perfect ever since.

    If you are expierincing these simptoms Check your injector harness........

    Take care.

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  3. #2
    cart69's Avatar
    cart69 is offline Cadillac Owners Fanatic
    Automobile(s): 96STS engine only!! only thing left from my 96 after divorce
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    Re: Is your N* running bad, hesitating, missing??

    thanks for the advice my 94 is having similiar issues now, will have to check that out!!

  4. #3
    BeelzeBob's Avatar
    BeelzeBob is offline I'm a Cadillac Fanatic!
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    Re: Is your N* running bad, hesitating, missing??

    Quote Originally Posted by Rick94STS
    FYI - last year my 94 STS starting running bad, hesitating and misfiring out of no were, I replaced everything: PCM, plugs, wires, O2 sensors, oil & filter, air filter etc..... Nothing I did helped!!
    My mechanic scanned it and came up with nothing useful. He did suggest to try replacing the fuel pressure regulator. As i was beginning to dismantle the top of the intake to get to the regulator I found my fuel injector harness had melted on the top of the trans housing causing two injector wires to short against the trans (ground). I repaired the melted wire harness and tie wrapped it up away from the trans.
    The Car has been running perfect ever since.

    If you are expierincing these simptoms Check your injector harness........

    Take care.
    Good catch...!!!!

    I had a Corvette back in 1987 that would act strange, blow fuses at random, loose the AC, etc.... Same sort of thing. Once I had torn enough parts off the engine I could see that there was a tiny spine of casting flash in the transmission bell housing that was sawing into the harness causing random problems.....damn wires....LOL

  5. #4
    Spyder's Avatar
    Spyder is offline Cadillac Owners Master
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    Re: Is your N* running bad, hesitating, missing??

    I recently r&r'd the intake on the 'ol Dodge truck...ran rough and died really easy when I fired her up the first time. I had been in a hurry and hadn't done a good enough job of holding all the wires out of the way when I bolted the intake down...quick and easy fix, but, like bbob said, damn wires.

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