[mike 96 ws6]

3 weeks ago my van would not start when I came out of the store, so I disconnected the battery - cable for ~15 min, then re-connected and it started up and has been running fine since. Yesterday it happened again, (same exact symptom) but disconnecting the cable did not fix this issue. I replaced the fuel pump and even straight wired a temporary power supply to the pump, but still get very little fuel volume/or/pressure at the fuel rail schrader valve, nor do I get much pressure/volume at the line going into the fuel filter. This would rule out any PCM, fuel pump relay, regulator ect. issue, right?
I'm just asking for ideas about what to check next since I desperately need this van running Monday morning.
Thanks once again for any help!!!
Mike