I have an 02 cummins ext cab short bed 4x4 with an auto. Truck was foggy and lost all power. Had codes P1698 P1689 P0237 which myself and mechanic buddy thought it was a bad vp44. So we replaced it with a new one from thouroughbred. Anyways he put it on and all the codes are still there and nothing has changed. I don't know what to do next!! Also have an airdog raptor and at WOT it still has 8psi