Question about 1997 GMC Jimmy

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MULTIPLE RANDOM ENGINE MISFIRES

Check engine light goes off for a bit and back on , car surges when normal acceleration. Runs better when warmed up, terrible when cold have had on five different diagnostics and all recommend same things have replaced sparks plugs and wires distrbuter cap and roter buttonand throttle position senser 3 times in a year at advice from computer. nothing has changed. I honestly don't know where to go with this but now tags have expired and it failed emissions and I am disabled and need my jimmy. Please help.

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  • fjowens32 Jan 19, 2009

    i have a 97 jimmy with the same random multiple cylinder misfire codes.

    replaced plugs wires caps o2 sensor. still same results. intake starting to show signs of leaking, going to have that repaired soon. i doubt the intke repair is related to the misfire but who knows. give me a clue so my jimmy is healed!!!!!!!!

    thanks

  • Anonymous May 11, 2009

    engine misfire

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Hi,
I have same problem with my 2003 Dodge Grand Caravan.
I just read this article below, hope it will help you..
http://www.aa1car.com/rando m-misfire/


Posted on Nov 23, 2008

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Have bad news for you
the valve springs get weak on the 4.3L motor and gonna need to get the heads redone

Posted on Feb 07, 2009

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Posted on Jan 02, 2017

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