Rough Idle
I have a new issue will my 03 Chevy 6.0. When the truck is cold it idles rough. Doesn't actually feel like a misfiring cylinder. In gear at a stop light the idle will drop below 500 rpm and the engine...
Forum Discussion
Don't know much about Chevy but it sounds like an ignition coil problem to me. Is this a Coil Over Plug (COP) design? Get a code reader and find out which cylinder has the most misfires. It probably will be like 10 times more misfires then the next closest one, this is a good indication it is the COP (or it could be the plug but less likely).
