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SO it seems that something may be up with your fuel delivery. To verify that you are "doing the test right" You need to hotwire the fuel pump to stay on for at least a few seconds.
You can do this one of several ways, the easiest iirc is at the fuse box, apply 12V to the fuel pump fuse to manually prime the system. Determine how much time it takes to get fuel flowing. Alternatively you can ground the fuel pump wire at the ECU which activates the fuel pump relay. Or, you can directly engage 12V to the fuel pump (+ positive) at the rear of the vehicle.
In any case, you need to figure out if the problem is one of these:
1. the ecu is not triggering the fuel pump effectively (but the fuel system itself is fine)
2. you have a blockage in your fuel system, physically restricting fuel flow
3. the fuel pump is not installed correctly, or is damaged internally
4. the fuel system has a leak between the pump and fuel rail causing loss of pressure
5. the fuel pump relay, fuse, or wiring is faulty (poor connection/voltage source)
to assist diagnosis of #1, manually triggering the ecu fuel pump wire (with a ground) will let you know if the ecu is capable of working the pump
for #2 you should start at the front and work your way back. remove the feed line next and see if fuel flows freely from the pump->fuel filter. If that fails, continue working backwards, i.e. remove the filter next and try again. then go to the tank and remove the feed from the tank and try.
After #2 it should lead (follow up) your proceedure to #3 and #4
and #5 may be last or first, depending how comfortable you are with electronics.
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