I have an 06 6.0L just hit 130k has sinister ficm, egr delete, and coolant filter innovative custom tunes leveled on 35's. (new to site)


I was headed to Menominee Wisconsin yesterday and I went on my hot tune (150) so I could perhaps get better mileage than what I would get on my usual everyday driver/tow tune (55) and I was cursing at 70 mph and laid into the throttle to pass a car staying in 5th gear and I was slowed by a abrupt chug or kind of a misfire if it was a gas engine. I tried to do it again and it did it 3 time on the way there. so before I left I tuned it back to the 55 horse tune and experimented on the way home and it didn't do or act up once. don't really know what to think was planning on purchasing the blue spring kit as well as changing my oil and running some archoil through it. seeming like a fuel issue or Stiction but also could it be a dirty turbo? thank you for any input.