So my budy has a 09 f250 with the 5.4 and called last nite saying the truck has no power on a hill or if he try's to pass someone one the hiway. Also said its popping through the intake and sounds like something is rattling on the front of the motor. Tried new plugs wires coils air filter checked the fuel pressure all that is good but truck is still running like shit. Any help would be appreciated thanks