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1990 Cadillac Deville

Tiny
BKWILSO
  • MEMBER
  • 1990 CADILLAC DEVILLE
1990 Cadillac Deville

WHAT MAKES MY 1990 CADILLAC DEVILLE BACKFIRE
Wednesday, May 14th, 2008 AT 8:26 PM

2 Replies

Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
What comes to mind is, engine misfiring due to needing a tune up and low fuel pressure could be another cause.
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Wednesday, May 14th, 2008 AT 8:28 PM
Tiny
BUZZSAW
  • MECHANIC
  • 1,198 POSTS
You need to scan your codes for me, off and warmer on the heater controls at the same time, with your key in the on position

Its probally your antibackfire valve that needs replacing and AIR pump, debris from the pump cause the valve to go bad, its on your back valve cover, yes the big black valve
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Thursday, May 15th, 2008 AT 12:20 AM

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