I have a 2004 F-150 Lariat 4 door which I had started and left idling to warm up prior to taking off. When I returned to the truck it had stalled and the low oil pressure light was on the message board. I tried to start the truck and it will not turn over. The oil level is fine and I disconnected the battery hoping that it would recycle the electronics and allow the truck to start. The truck still will not even attempt to turn over. Any suggestions or comments are appreciated.
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it could be the PCM , but I would check the fuel pump relay first. the relay could be sticking to make the fuel pump run all the time. as far as the dying problem you may want to check the idle air by-pass valve to make sure your idle rpm's are sufficient.
Just having fuel is not enough on this engine, here are the spec's. Even 1 psi out of spec can cause a no start.
Pressure 1 (PSI)
Pressure 2 (PSI)
Pressure 3 (PSI)
60.0 - 66.0
50.0 - 63.0
Y131: System pressure with ignition on (PSI). Y132: System pressure while idling (PSI). Y133: Fuel pump pressure (PSI) with return line briefly restricted.
try fittung a larger capacity battery this will help when you are parked for extended periods of time, but it does sound as if you have something draining the battery, try getting the alternater checked