Im thinking egr related like others, make sure to egr is deleted in your tunes, mine did that with the egr delete and stock tune, maybe try erics tunes
Well come to find out, the problem all along has been the fact that I didnt have an EGR valve plugged in. Once I got one installed and plugged in the problem went away and the truck runs great. Ran the truck in temps today from 72F to 85F and couldnt recreate the problem where a week ago I could it to exhibit the problem with IATs down as low as 68F everytime.
Sorry to drag this thread back up but just wanted to provide closure for anyone else that may experience such a problem.