1999 Chevrolet Suburban Vehicle Backfires While Running

1999 CHEVROLET SUBURBAN
18,900 MILES
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vehicle backfires while running
Mar 25, 2013 at 7:30 PM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
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?
Mar 25, 2013 at 8:07 PM
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