I have a 2004 6.0, I have done a great deal of work on over the last few weeks. I now have a problem upon start up. I can start the engine cold and it will start fine and idle smooth. After about 1 minute of idle / warm up time it starts idling rough. It will continue to idle rough and if I try to drive it, it has loss of power and misfires like crazy. Once I drive it approx. 3.5 miles, it clears up and runs great. Only have the problem when the engine is cold after idling a few minutes. Any thoughts as to what the problem could be?
Thanks
Thanks