Howdy,
I got a 2004 F150 5.4L with no power at all 8 injectors. The pickup will crank, has power at the fuse box, and the fuel pump will pump. Any tip on where to look for the problem?
Thanks,

 

Follow the red wire back. There's an open circuit between the injector portion of the harness and the splice (S103) that taps off power for the PCM. There's an inline connector, C136 pin 3 that is in that run. C139 is on the passenger side rear of the engine compartment and is a square 12-pin connector. That would be both a suspect connection as well as a convenient location to half-split the circuit for testing.

 

Thanks for the help,
While following the wire I found a sensor unhooked. After that it started right up.
Thanks again for the help.

 

Awesome! Glad you got it fixed!