DF5152

Ok I have been chasing a no power issue for a long time truck is out of warrantee so the parts changers at the dealer are out. Truck makes boost 24psi egt's go up and down, tranfer pump make way more pressure then I need. all the injectors have been removed tested and reinstalled, FCA changes rail valve plugged cascade overflow vale changes. no codes ever, scanner says cp3 is making pressure, not sure about volume, new crank sensor new map sensor because the AIT portion didnt seem to be functioning voltage was way off according to what I could find. Truck use to be able to put me back in the seat now sometime I can run faster then this thing. what next. how do I check the CP3 output volume. getting tired of this truck is gonna go bye bye soon