Drove my truck to town to run some errands. Ran great. Got home and parked it. Went out yesterday and outa the blue it won't srart. Fuel gauge says 1/4 tank. Rolls over fine but nothin. Has the 5.4 Triton.

 

fuel pump most likely the problem. the 5.4 is known for that.

 

When you turn the key on, do you hear the fuel pump run for a second or two? Is there any fuel pressure at the fuel rail? There's a Schrader valve on it to test, it needs 28 psi to start.

If the pump doesn't run, check the inertia switch, relays, and fuses.

 

Thanks for the input but I think I figured it out. Lost the original key so was using a spare. Need to get new keys because they're chipped. =glc;5083532]When you turn the key on, do you hear the fuel pump run for a second or two? Is there any fuel pressure at the fuel rail? There's a Schrader valve on it to test, it needs 28 psi to start.

If the pump doesn't run, check the inertia switch, relays, and fuses.[/QUOTE]

 

Was the theft light blinking like crazy?