Kral77

Hello everyone. New to the forum and need some serious help. I have a 05 F150 SCrew 4x4 Lariat with the 5.4 3V Triton. Having several issues with it. Trying to see if anyone else is having the same issues or knows of a fix. CEL is on throwing several codes. Truck runs perfect at times and then falls flat on its face at others. Here is what I have. Codes are: P0174 (too lean bank 2), P0171 (too lean bank 1, P0300 (random misfire), P0303 (cylinder 3 misfire) P2195 (02 sensor stuck lean Bank 1 sensor 1), P2196 (02 sensor stuck rich bank 1 sensor 1). Here is what has been replaced and/or done. New injectors (went from the factory 2 hole to aftermarket 4 hole), Spark plugs (all 8), COP (all8), 02 sensors (all4), Fuel rail pressure sensor, MAF, Throttle body sensor, variable timing cam sensors, new exhaust manifolds (one was cracked), cleaned out the fuel pump canister above spare tire (not sure of the technical name for this). I have been chasing these codes for awhile now and am at my wits end. Can't really afford to have a mechanic hold it for 3 days and charge me an arm and a leg for it. Been told that the timing phasers are bad, but it doesn't sound bad. Engine runs smooth for the most part, but will stutter every now and then. This truck will run like a scalded ape at times and then fall flat on its face. (Literally slowing down while the gas is pressed to the floor) Hopefully someone has some ideas because I'm out of them. Have even considering doing the heinous act of selling this truck and buying a different make! (God forgive me for thinking about that) All ideas or advice is welcome. Thanks in advance.

SCORGE

Fuel Pump Driver Module?

BadFish523

What brand of plugs and coils?

Phil48315

With all those lean / rich codes.... whats the fuel pressure?
Did you check for intake manifold leaks ?

When does it run like crap .... cold, hot, light load/heavy load?
How many miles? .... original timing components?

techrep

iTrader: (1)

After all those parts you still have all the DTC’s you mentioned ? Or have some cleared ? And what brand parts like asked above ?

Arizona Tumbleweed

Ever replaced the fuel filter?

Eric Kleven

Cheap stuff first:

1. Fuel filter
2. FPDM
3. fuel pump (unlikely)


Find ground connections and clean them.

Kral77

Kral77

techrep

iTrader: (1)

How did you clean out the FPDM ?