Dominator Posted December 14, 2010 Report Share Posted December 14, 2010 2000 Seville threw up trouble code 300 (engine misfire) and check engine light flshing as it was being driven. As of this morning now will not start with temps at 9 degrees. Is replacing the plugs a good starting point? Perhaps a bad coil pack or ignition module? Could use some advise. Thanks Link to comment Share on other sites More sharing options...
BodybyFisher Posted December 14, 2010 Report Share Posted December 14, 2010 2000 Seville threw up trouble code 300 (engine misfire) and check engine light flshing as it was being driven. As of this morning now will not start with temps at 9 degrees. Is replacing the plugs a good starting point? Perhaps a bad coil pack or ignition module? Could use some advise. Thanks As you know, P0300 is a random misfiring cylinder. Is P0300 the only code? Look for a P030x where x is the specific cylinder misfiring You have COP ignition. From Logan's experience, those coil packs can malfunction, so much so, that he carries a spare in his trunk, like I carried points and condensers in the old days. I would try to determine which bank is misfiring. You may be able to carefully listen with a scope and hear there is a problem or you can find a code reader that will track misfires like my Autotap does. Misfires would be out of the park on specific cylinders and possibly one entire bank. My guess is that its a coil pack, determine which one and plug up a "known good" pack to diagnose it and see if that solves it Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.