Question about 1994 GMC Jimmy

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4.3 cpi rough idle ,pops on acceleration to

4.3 cpi rough idle ,pops on acceleration to intake,54 psi fuel,new tps/fuel filter/fuel,motor dies when throttle opens,no codes

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Chk theTPS Throttlrposiyion sensor Good luck, Ned

Posted on Sep 27, 2009

  • Ned C Cook
    Ned C Cook Sep 28, 2009

    The throttle position sensor will affect smototh acceleration. The maf sensor affects air fuel ratio. If it runs lean it will baackfire. Ck the MAF sensor for dirt contamination. It's in the intake duct in a metal section of. Spray clean with CRC electical cleaner. spray wash only, do not rub, brush or touch. Use NO compressed air. the sensor is fragile and expensive to replace. Good Luck, Ned

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Did you check for vacoum leaks?

Posted on Sep 26, 2009

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1 Answer

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