Third day in a row!!!

This time it died on me while driving. I pulled over and manually activated the fuel pump relay and it just keeps pumping, like it is pumping air. This time it started after about 5 minutes and when I got home I double checked the fuel pump relay and it made a completly different noise, so I am sure it was pumping fuel at that time. I will study the wiring diagrams tonight. Any thoughts?? Thanks a bunch.