Doostur

I was driving home, when my RPM's dropped from 3 grand down to 0 and then back 3, you could feel the engine hesitate, like it was running out of gas. Did it a couple more times in a row, same thing, and then it was fine for the next 80 miles. Then it started acting up again, and thought it might have been bad gas, so I ran the tank dry, and refilled it. Still same thing, and 20 miles later the rpms dropped down to 0, stayed there and the engine died. Tried restarting it, took like 20 minutes before it started, drove it back home and parked it. Next morning started right up, but didn't go anywhere. Replaced fuel pump relay, nothing