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Intermiten Misfire and check engine light

Tiny
POCKETS816
  • MEMBER
  • CADILLAC DEVILLE
I have a 2000 cadillac deville DTS with 70,000 miles on it. It will cold start and drive fine but after warm shut of sitting for 10-45 mins it will start up and run real rough. Check Engine lignt will flash and run poor for several miles and then: check engine light goes away and it will run great again. Code I get is P0300 multi cylinder misfire. It only does this if it sits warm for several mins, always cold starts fine and runs great. Is it a coil pack over heating problem, If so how do I check a coil pack. I have had it off, no cracks or visable problems.
Thanks for any help.
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Monday, May 7th, 2007 AT 12:15 PM

1 Reply

Tiny
POCKETS816
  • MEMBER
  • 3 POSTS
Problem was the front coil pack. Pack had cracks in it replacement part $250 from partsamerica. Com.
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Saturday, May 19th, 2007 AT 1:20 PM

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