2002 Chevy Avalanche missfire

2002 CHEVROLET AVALANCHE
165,000 MILES • V8 • 4WD • AUTOMATIC
Avatar
KARLWL
  • MEMBER
  • 1 POST
engine displays error code missfire.
idles rough and problem is worse in colder temps
Nov 21, 2008 at 8:07 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • CAR REPAIR CONTRIBUTOR
  • 110,190 POSTS
Hi:
Were you able to determine which cylender was the problem? It could be a few things causing the problem, but most common is a weak coil pack in the affected cylender. I also could be a fouled spark plug. Was the engine tuned reciently?

Let me know if you have any other info.
Nov 29, 2008 at 5:32 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.