Need help on a 5.4

[Prok]

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

[somethingclever]

I think it’s a 3v.

Probably failed cam phaser.

[Prok]

I'm not a ford guy so any way to check that. Only code it had was a multiple misfire

[PaxtonShelby]

Could be what John said...did any of the clips break where the harness goes to the coils? Those things are brittle little f’ers.

[Prok]

I'm going to look at it tonite but I'll check those out also. I told him we need to drop the exhaust and make sure the cats ain't clogged I heard those on known to do that

[PaxtonShelby]

My 2005 F250 felt like it was running on 1 cylinder. Not even exaggerating. Ended up being the driver rear coil clip being busted. I had to use electrical tape to hold it in place. Problem solved.

of course...this was AFTER I changed plugs and coils and MF’d the truck for a few weeks.