2004 Cadillac Deville misfire

Tiny
JOKER_505
  • 2004 CADILLAC DEVILLE

Engine Performance problem
2004 Cadillac Deville V8 Front Wheel Drive Automatic 95000 miles

i have an 04 deville with multiple misfires. I have replaced the plugs and coil packs, and it got a little better but it still misfires enough not to pass emissions. Any idea's?

Do you
have the same problem?
Yes
No
Tuesday, April 28th, 2009 AT 9:29 PM

1 Reply

Tiny
FACTORYJACK
  • EXPERT
  • 4,259 POSTS

If you can determine which cylinders, swap some secondary parts. If the misfires are on 1 bank, swap the coils. Or change plugs of affected cylinders. If the fault stays with the cylinder, you could have dirty/sticking injectors, water in the fuel, or a mechanical problem. A compression and leakdown test would be advised at that point.

Was this
answer
helpful?
Yes
No
Tuesday, April 28th, 2009 AT 10:29 PM

Please login or register to post a reply.

Other Engine Misfire Questions