Cm870 550 hp egr problems

[Rawze]

Gearhead or Unilevers are the ones to ask those kinds of questions to. They custom tune CM870's all day long.

Posting the engine serial number, the wedges that were used, ECM program you are supposed to have, and the one you actually have currently in the ECM would help. At least someone can look at the files and see what is different.

I have also seen many shops make the mistake of putting the injector cam wedge in the valve cam and vice versa. it can make for similar problems to what you describe. Saw someone do that to a CM871 recently, and it smoked a bit, ran hot, and had low fuel mileage.