1991 Gmccould throttle body make it back fire

Asked by Oct 04, 2014 at 09:22 PM about the 1991 GMC Sierra

Question type: Maintenance & Repair

Message me on fb please the fuel
pump And plugs are new

2 Answers


Usually back fire mean,s ,it may have jumped timing.


What the heck is fb? When does it backfire? Under acceleration, at start up, ideling?

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