Cumins isx 15 NEED HELP AND ADVISE

[Waterloo]

You do not understand, nor do you know how these motors or programming work. A crap delete will run fine for the first year or more, and then it bites you in the rear. I bet those cans of yours were never properly hollowed out, and you are now seeing the results as they clog and destroy your motor. Then the fuel pump... You keep taking it to this guy, no need to be here, sounds like you have it figured out. Good luck!