283,000 miles. Engine rebuilt @ 210,000. The fuel pump relay did go about 6 months ago and i replaced it with a new one. I bypassed the relay and the fuel pump exhibits the same behavior as with the relay installed. Its not a steady on/off either. Very irratic, comes on for a second, goes off for 10 seconds, comes on for 5 seconds, off for 2 seconds, and so on. Does the same thing with or without the relay installed. I can only tell what is happening with the pump by listening, and there is no fuel pressure at the the injectors. Do you know how many pumps this car has?