2000 GMC C2500 back fire

2000 GMC C2500
Avatar
BIGBLOCKTODD
  • MEMBER
  • 1 POST
Engine Performance problem
2000 GMC C2500 V8 Four Wheel Drive Automatic 126k miles

my truck has a 454 and has two different problem im dealing with. number one is that it eats injectors due to leaking fuel after 12 to 15 k miles. the one i'm most concerned with is an intermittent back fire on initial start up almost instantly when starting to crank. Is more prominent when injectors are new and not leaking. have replaced crank sensor pcm and all tuneup parts. please help. thanks todd.
May 25, 2010 at 1:24 AM
Advertisement
Avatar
MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
Check for any vacuum leaks as a lean mixture will backfire, start here.

mark (mhpautos)
May 25, 2010 at 1:38 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
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.