2000 F150 with 5.4, struggled one time last week, but managed to start after a few tries. then yesterday it stranded me in a parking lot. sounds like it's not getting fuel. 120,000 miles. is it common for the fuel pump to give up on these trucks? I assume it's in the tank and a real bear to change. looks like the pump is pretty cheap.
Prove the pump is the cause before you take anything apart.
Test for fuel pressure at the fuel rail port.
It needs to be 35 to 40 psi running then hold that pressure for at least 5 min or more after shut off.
Key to run starts the fuel pump for a couple seconds then it stops.
Key on again and it should run a couple seconds again to build more pressure.
At cranking, the pump runs full time.
pump and filter replaced. did it the hard way, like i do most things; dropped the tank. anyway, it's running smooth again :-) one less fire to put out for now. Home A/C is on the fritz and the viper won't hold a charge.