Search found 4 matches

by tunnel ram efi
Tue Apr 21, 2009 8:15 am
Forum: Injectors, Fuel & Air Supply
Topic: fuel pump safety switch wiring
Replies: 4
Views: 412

Re: fuel pump safety switch wiring

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 ...
by tunnel ram efi
Mon Apr 20, 2009 7:01 am
Forum: Injectors, Fuel & Air Supply
Topic: fuel pump safety switch wiring
Replies: 4
Views: 412

Re: fuel pump safety switch wiring

Why do GM tpi motors use this set up and what happens if the fuel pump relay quits? Rich
by tunnel ram efi
Fri Apr 17, 2009 10:07 am
Forum: Injectors, Fuel & Air Supply
Topic: fuel pump safety switch wiring
Replies: 4
Views: 412

fuel pump safety switch wiring

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
by tunnel ram efi
Wed Jan 28, 2009 4:02 pm
Forum: Relay Board
Topic: GM 8 pin module wiring to Relay Board
Replies: 2
Views: 925

Re: GM 8 pin module wiring to Relay Board

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