97 cadillac sts back fires

1997 CADILLAC STS
126,000 MILES • V8 • FWD • AUTOMATIC
Avatar
MICHAEL HILL
  • MEMBER
  • 1 POST
MY 97 CADILLAC STS BACK FIRES ONLY WHEN IM TRYING TO FIR IT UP
Feb 19, 2011 at 8:26 PM
Advertisement
Avatar
FACTORYJACK
  • CAR REPAIR CONTRIBUTOR
  • 4,159 POSTS
Some backfiring is common characteristic, if you release the key prior to it starting. Another possibility is a leaking fuel pressure regulator adding some extra fuel to the intake.
Feb 22, 2011 at 4:54 AM
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.