Beastgt00

2004 f150 xlt with the 5.4l triton.
Here's all I've do one so far and still won't start.

No engine light.

No theft/security light flashing.
I checked for fuel all the way up to the fuel rail. Good pressure.

New fuel filter

Coils and injectors both have 12v.

Coils have spark

Ignition switch is good.

Crankshaft pos. Sensor has been replaced.

Has new spark plugs.

No burnt fuses.

Checked relays.

I'm out of solutions. The only thing I can think of is a bad E.C.U

techrep

iTrader: (1)

Have you tried starter fluid in the TB to see if it will fire ?

Beastgt00

Tried starter fluid, nothing

Beastgt00

I've figured out that it will start if I disconnect the cam position sensor from bank 1. Still has a bad misfire though...

LariatDude

Perhaps it has gone bad and thus the timing is now way off according to the PCM. Might not be firing spark or injectors at the right times.

dv86

Did you figure out what the problem was on the 04. I have and 04 fx4 that is doing the exact same thing. I have replaced the fuel pump, filter, driver module, vct solenoids, and both cam position sensors. Cranks but doesn't start. It does start when it wants to and then runs fine

Beastgt00

Bought a timing chain kit which included the cam phasers. After installation, the truck runs fine

Beastgt00

Turns out, one of the him I g chain tensioners broke, causing the chain to loosen up which led to the bank 1 cam phaser to jump a spike. Which is why it would start when the bank 1 cam sensor were unplugged