View Full Version : Coil pack or plug replacement?

10-29-06, 12:41 AM
I have a 1998 Catera with 145K miles. It started misfiring. The diagnostic code states p305 showing the misfire is coming from the No. 5 plug. Would this necessitate a replacement of the coil pack? The mechanic is stating the coil pack must be replaced. Any info, help, or assistance would be sincerely appreciated. Thanks

10-29-06, 03:21 AM
Check the sparkplug and wire first.

10-29-06, 10:18 AM
I had the same problem in my 97. I had 2 cylinders misfiring. Mine turned out to be the plug wires. With the miles you have, I'd sure try that first, they usually go bad on these cars.