Mechanics

CHEVROLET SUBURBAN BACKFIRE PROBLEM

1999 Chevrolet Suburban • 18,900 miles

Vehicle backfires while running
Avatar
Guest
March 25, 2013.



Some possibilities.
Check the egr valve.
Sticking or leaking valves.
Valve timing.
Check for vacuum leaks.

How long since a tune-up? Are there any applicable trouble codes?

JDL
Mar 25, 2013.