94 Aerostar Issue

I realize my van is old and has high miles, but until it stopped pushing fuel it ran great! It is a 94 Aerostar AWD 4.0L with almost 170,000 miles. I was out and about with it 1 day, had no problems whatsoever. No odd noises, no sputtering, nothing. That evening after driving it we had a MAJOR blizzard lasted 2 days. After the blizzard died out, I went to go somewhere and my van would not start. I have changed the fuel pump, fuel filter, fuel pressure regulator, spark plugs, wires, coil pack, crankshaft position sensor, electronic ignition was tested and is fine. It cranks but will not start. After 3 months now of checking and replacing everything I can think of I pulled off the fuel line at the filter to see if it was even pushing fuel. It was bone dry! No gas has ever even gotten to the filter. I can hear the pump in the tank running. What would stop fuel from going through the fuel line? Any idea on how to figure this out? I'm totally at a loss now. Thanks for any advice anyone has!