One night while driving the 4R, it was running fine and normal. I parked it went grocery shopping and it didn't start. It runs if I spray starting fluid into the throttle body, but dies one it's gone. I changed the fuel filter, no change. I turned the key while the filter was off and no gas came out. I'm thinking fuel pump, ECU, or the relay for the EFI. How often do relays go bad? Also if it is the ECU, would one for a 2001 work?