Mechanics

BACKFIRING

1988 GMC Truck • 6 cylinder •

88 gmc 90 motor backfires and pops on hills when heavy accleration is applied. What wrong tried new plugs
Avatar
Brookemontb
January 12, 2011.




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

Docfixit
Jan 12, 2011.


AD