Well we finaly have the problem fixed on the service truck i posted about, after trying all but the vp44 that was the problem, this truck never had any code to point to the vp44, for it was a mechanical problem within the pump that never triggerd the elctronics. man you can sure tell the differance with the a$$ dyno. the Cummins is happy now and the demond is dead. HarvOo. Oo.