Im sorry, i know y'all hear this question all of the time but i have been looking through threads and cannot find an answer. My 2006 6.0 starts no matter what temp outside and has a rough lope kind of idle for about 10-15 seconds and then smooths out. There is no smoke, good FICM voltage, new injectors, and new glow plugs. I imagine something to do with the ipr, pcm or something along those lines? Please help thanks!