I have an 06 F250 with the 6.0. It has a chip, the Edge programmer box, and the exhaust has been altered. As far as I know this is all thats been done to it. I bought it this way in February. For some reason, and I have no idea if this is normal although I have a feeling it isnt, when I start the truck it runs like absolute garbage until the temperature hits 186 degrees. After that it runs great. I dont know anything about diesel motors so I dont know if something has been re-programmed or if I have some other underlying issue looking to empty my wallet. I have also noticed at times while running at highway speed sometimes it has little "hiccups" like it isnt getting fuel or something. One other thing which I dont know if it makes a difference is it had all the aftermarket work done in Utah and Im in Oregon. Maybe an altitude thing? Any help is greatly appreciated.