f150fordpaul

hello ppl need some help with my truck its a 2004 f150 5.4 3v problem is when I push the gas it has no power things I done so far replaced both vct both cam phaser both cam sensors fuel filter no check engine light on but code reader says lean bank 1 and 2 and if I hold the gas peddle at 2500 rpm the passenger side of the exhust get red hot up by the cat any help would be great thanks also the truck seems to be fine when I rev it up while in park

tareed94

Could it be a plugged cat? With the way it's getting red hot by the cat it sounds like the exhaust gases aren't flowing through properly. Does it move at all? Does the truck die when you let off the gas? Mileage on the truck?

CSprain

Sounds like a clogged cat or restriction in the exhaust if the exhaust is getting red hot.

dcarr

+1 on the cat

f150fordpaul

170 000 on motor yes it will move as long as I don't hit the gas hard and dies sometimes but not all the time could I just drill a hole and release the pressure if so how big of a hole and thanks for the reply

f150fordpaul

looks to be red hot on the resonator

dcarr

is there a flange before the resonator? if so unbolt it there and see how it runs.

f150fordpaul

no its welded there also is it possible that the resonator is pluged

dcarr

i suppose anything is possible.

melrose99

That is a bad cat. Go to a good muffler shop.