MSefi.com read only forum (Jan.15,2018)

I am pretty sure that the oil pressure switch by passes the fuel pump relay to provide voltage to the pump in case of relay failure. I found out that GM no longer installs this feature, so nor will I. I was just trying to follow Megasquirts wiring instructions and get all the necessary wires in my ...

Why do GM tpi motors use this set up and what happens if the fuel pump relay quits? Rich

I am using MSII with the relay board and cannot find a wiring diagram for the fuel pump relay and a oil pressure safety switch. I am using a 3 prong switch from a early GM, not the specified Holley switch. Is this not just a limp home feature if the relay fails? Thanks Rich

I installed this jumper from the "GV"middle terminal to position 20 on the terminal block. Is this all that is reguired for an 8 pin HEI to use the Fidle relay? I have seen 1K resistors and such on other forums plus I don't see any reference for HEI in the spare port settings. Rich