06-01-2009, 03:50 PM | #1 |
Registered User
Join Date: Jan 2008
Location: Hawthorne,CA
Posts: 114
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1969 GMC backfires
I have a 1969 gmc c25/pick up. I put two cherrybomb glasspacks about 2 weeks ago and the truck backfires when i decelerate from high or medium rpm. It never did before. wats wrong. All it is is the glasspacks and no muffler/exahusts.
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