Help! Very odd issue

Thanx guys for the input. I never thought of the wiring issue, but makes good sense since I have changed almost everything else .... lol.

Pressure at fuel rail maintains 50 psi both when able to start and not able to start.

Oh thats just wrong.

I've had the same problem and it was the computer. what happened is that the fuel pump had a short and the draw caused my computer to malfuction. the problem was sporatic for about 6 months then it went dead..