When I mentioned earlier that my truck was near undrivable after I made my 5 inch intake and didnt rescale it, if I held the pedal to the floor long enough (20 seconds) it would finally see enough air moving and start giving it fuel and it would pick up a little then out of nowhere it would snap ou're neck and take right off..let off and it was the same thing all over again. My maf was scaled rather aggressive for a 4 inch Intake tho so that might be the difference. If the maf was scaled conservative, I could see it not fueling at all.
I called dt. They said they rescale the maf conservatively so it doesn't run to much fuel and run hot. So they said send the ecm back with a return label and they will bump it up more and send it back the same day.