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On my 92 gmc z71 i can slowly press gas and runs fine but if i give it gas it bogs down and backfires then takes off

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  • jimlaney
    jimlaney Oct 31, 2012

    I have already checked fuel pump and gas pressure and fuel filter I have also check for vaccume leaks and replaced valve body gasket and check mass airflow sensor and ever other sensor that plugs into throttle body


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  • Cars & Trucks Master
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Check timing yet? Try advancing it slightly a few degrees.

Posted on Oct 31, 2012

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SOURCE: 1999 Dodge Ram 1500 - Cranks fine, idles good, but

check ignition timming

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SOURCE: 1998 Ford F-150 4.2 V6 starts and idles fine ibut bogs when step

i had a van do this same thing to a tee turned out to be a broken key pin in the harmonic balencer causing the timing to ****** replaced balencer and ran like a dream there is a crank sensor grid on the balencer when the key pin broke it trew the timing off

Posted on Jan 14, 2011

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