Hello my dad has a 2016 f350 6.7 superduty he just got done having his truck in the shop for a week and a half, they changed out the computer, turbo, and transmission (it was a used tranny with 40,000 miles) and I also changed the #5 injector, that fixed the problem temporarily. Now he’s having a problem of the truck derateing without any codes. He can run for about 10-15 miles then it derates, he sits for about 5-10 minutes then it boasts like a new truck for 10-15 miles and repeats.

I should probably mention that he husks rv’s and cars across the USA so he has almost 450,000 miles on it.