BACKFIRING

1988 GMC Truck

Tiny

brookemontb

January, 12, 2011 AT 4:11 PM

88 gmc 90 motor backfires and pops on hills when heavy accleration is applied. What wrong tried new plugs

FOUND 1244 RELATED QUESTIONS

1 Answer

Tiny

Docfixit

January, 12, 2011 AT 8:56 PM

Maybe weak ignition coil pull wire see if spark is blue/white if orange/yellow replace

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