[Ether]

OK CD I need some help.

2001 Ford Crown Vic 4.6L V8

symptoms:

turn ignition key to "ON": I can hear fuel pump run for roughly 2 seconds

turn key to "START": engine starts immediately, runs fine for about 1 or 2 seconds, but then starts misfiring and stumbling and dies after about 3 to 5 seconds.

The above is repeatable. Happens every time.

There's a half a tank of fresh gas in the tank.

Since it was so easy to do, I installed a new fuel filter, but that didn't help.

Any help you can offer would be greatly appreciated.


Some questions:

1) I understand there's an inertia switch to shut off the fuel pump in case of rear-impact collision, and sometimes these switches go bad. But since I can hear the fuel pump when I turn the key to "ON", and since the engine starts fine, I assume this switch is not the problem?

2) How does the engine computer regulate fuel pressure in this vehicle? Does it read a fuel pressure sensor and pulse-width-modulate the fuel pump voltage accordingly? If that sensor fails, does it typically fail to a "high pressure reading" state that would cause the engine computer to leave the fuel pump off? Where is that sensor located on this vehicle and how difficult is it to replace?

3) If I can get my hands on a scan tool that can access live data, is there a PID for the above-mentioned fuel pressure sensor?