the moter sounds like it is surging it runs fine if i stay off the fuel if i get on it hard it will get louder and quiter and it will do it til 1800rpm on the hiway and then it stops for a wile i can cruse around town it will be fine till i get on it agen then it will do it some more i have 9 psi at idel and 5-7 crusing 3at WOT the dealer installed a in tank FP the IP wire looks like it has ben taped by the previous owner will that void the dealer warrinty?? is this a ip problem or should look for some thing else

 

well today it ran fine i pulled a tractortrailer out that was stuck in the mudd and after that it ran good no noise or any thing may be it likes hard work

 

These trucks love to work. Seems like evry time that I have pulled something, that it ran much smoother.