Fuel issue or something else?
Mods are in my sig, brand new 155cc full force injectors, stock fuel pump. Truck has been running awesome up until about a week ago and have about 6000 trouble free miles lol. So this Cummins dually comes screaming up behind me blowing coal all over and obviously wants to run...so we ran from about 2nd gear to the top of 4th. I won (my only consolation) and began decelerating from about 3400rpm lightly breaking and coasting. As I tap the throttle the motor begins to run rough and vibrate a some. Zero white smoke, zero coolant or oil loss. I get about a mile down the road and it smooths right out and drives fine. For the last week it runs fine until I really get on it then same thing, runs rough but still builds boost and even accelerates (just not smoothly) for a mile or so then acts normal. I don't have a scanner and no hard codes....any ideas ?
2006 F350 cclb 6spd, studded, mbrp 5" TB, Full Force 225cc injectors, S467.7, custom pedistal & up pipes w/ext waste gate, egr delete, sinister coolant filter,new oem oil cooler, custom IC pipes, Thumper II HPOP, RCD reg return, SCT custom tunes, southbend clutch single disk, custom fab 4.5" lift, 315/70r18 toyo mt