Cm570

[Popeye]

I'm new here so pls bear with me I've got a 2000 Pete with a cm570 bumped up to 550 up 18 sp First time it was as though I turned key off then on very quick ,did it a couple times After 200 miles without doing it then it started to run very rough past about 1300 -1500 n up rpms popping buckin .lowering rpms helped but can't drive it that way I'm at Cummins place in Albany Georgia They've been working on it for 5 days. 1 injector replaced great fuel pressure , fixed waste gate actuator, c clip came off at waste gate ,checked for cracked tone wheel at cam n crank .Replaced both cam n crank sensors. Removed ifsm n rebuilt Has 4 new actuators but they checked em anyway 2 full tanks of fuel with good quality They ran the overhead too Everything that's been checked is working as it should be Cam wedges installed timing pin goes in .Cam gear hasn't slipped Truck idles perfect up to about 1300 rpms
Turbo is fine They got engineers work in on it n still haven't fixed it. They sent a special tech up from florida today with a new ecm Have yet to hear from him but it's early. I'm all out of ideas. What's going on with this. Ty[/size]