Cadillac Owners Forum banner
  • Hey everyone! Enter your ride HERE to be a part of August's Ride of the Month Challenge!
1 - 2 of 2 Posts

2000 , 1997, & 1992 Devilles
3 Posts
Discussion Starter · #1 ·

Hello, recently purcased 2000 deville northstar engine. I am getting code PO300 engine misfires. I have checked and replaced the plugs, have no vacuum leaks. Checked the EGR valve. No clogs in the catalic converter, no leaks. I suspect that it may be related the the ignition module or the coil, but I am not sure. Need advice or expertise please.

1 - 2 of 2 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.