if there was an air leak would they be dripping? and the psi numbers that i listed above sounds like the lift pump is good right?

ya but what is it under a load. and not if its on the vaccum side of it and not the pressure side. or it could be internal like an injector or connector tube leaking. then it would be returning through the return line back to the tank or getting burned

VP44, APPS, ECM, or Bad Injectors.

the psi #'s i posted where done in park really have no way to test it when under load cause the guage is under the hood, it was just a tester guage that screws into the port so i had no hose to string inside the cab if that makes sense. and i just looked over the lines from lp to tank, and saw no signs of a broken line that could be letting air in.they would be wet if there was a leak.

codes?:w2:

nope no codes.