Truck started losing prime again after running two weeks no problem and with clean filter. If I assume I need a fuel pump what do they cost? Second question can I just put a air dog on and leave the std fuel pump? I did get an engine check lite on for a few seconds once. I can prime it to start but then it will stumble and stop sometimes. It takes 60 good pumps to go. Truck has 50K and had new set of injectors 2 years ago in JULY.