I recently installed a fuel pressure gauge. Darn good thing I did. My readings were great. 15 psi @ idle,11-12psi @ cruising speed,a minimum of 9psi @ WOT. Note I said were great!Yesterday morning the readings took a dive. A maximum of 11psi and a minimum of 0psi WOT. At first I thought it could be my sending unit. But I ruled that out because when bumpimg the starter I would get 15psi. When the truck is running it is 9psi @ idle,6-7 psi when cruising and 0psi WOT. In fact once it dropped to zero and stayed there for about 3 miles at 2100rpm. It goes to the dealer Tuesday. I hope they tell me it is just my sending unit. But if not its a lift pump and I would assume that with a 0psi reading that an injector pump is needed. Correct?Naturally it just before a trip to eastern Oregon and this dealer doesnt stock anything as far as parts.


