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@850 Tacoma
it sounds like the check valve mechanism in your pump is gone. Fuel injected systems need more than just 'the presence of fuel' to start - they need the correct fuel pressure and the correct volume. I think the pumps in these cars are rated at ~250lph or something like that, but I'm sure that's more than what is needed as most of that will normally get sent back to the tank by the pressure regulator.
The really important factor here is the pressure - there needs to be ~35 lbs pressure at the fuel rail in order for the injectors to work. So if the pump is not producing enough pressure, or the regulator is faults in some way, or (as I suspsect in your case) the pump's check valve allows the pressure to leak away when the pump isn't running, there will be problems.
Rather than cranking for ever, if the fuel pressure is really the problem, you can re-prime the system by turning the key from 0 to II and leaving it there for a few seconds to let the pump run, and then repeating. The ECU turns the pump on for about 2 seconds when the key goes to the II position. You should be able to hear the change in tone the pump makes going from a higher pitch hum (low pressure in line) to a lower pitch hum (high pressure in line) indicating the system is priming. Repeat the turn-to-pos-II a few times until you don't hear the pitch getting lower anymore and then try to start it - it should fire right up.
Ideally you should replace the pump for one with a good check valve, or buy an inline check valve like the 740s used to use, and jimmy that into your fuel system. FCP has them listed for a 740 for ~15$ I think.
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1998 V70 AWD Turbo 195k+
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