Thanks for the suggestion. I have been through the fiel system as far as new pumps. And new sending unit. I also removed and re sealed the tank. I noticed that the factory wires at the plug are a bit worn. I was considering just running all new wires for the injection system from the relay.Regarding your issue with the fuel pump relay; it could very well be more of a problem in the plug itself. I have seen the wiring insulation deteriorate and also the wire strands breaking causing the resistance to increase. Have you tried replacing the electrical connector to the relay?
S-659
Electrical Connector
POP: D
Per Car: 1
While swapping to the more common configuration relay at the same time.