Rumnhammer Posted July 10, 2006 Share Posted July 10, 2006 Hi i'm looking for the location of the fuel pump relay in a 75 280z, is it a separate relay or the combo one that is part of the fuel injection relay that is over by the ecu? i'm doing an RB swap and want to know where to run the pump signal to. if it is the combo fuel injection relay then I'll get a genaric 30amp relay and just wire it in. Thanks Chris Rummel Quote Link to comment Share on other sites More sharing options...
Rumnhammer Posted July 14, 2006 Author Share Posted July 14, 2006 Nobody knows? I'm starting to think the 75's fuel pump didn't have a relay, and maybe just was wired to a 12volt hot. I guess I'll just have to trace the wires back from the fuel pump and find out for myself. I'll likely just run a generic 30amp relay with separate wires anyway. Chris Quote Link to comment Share on other sites More sharing options...
Forrest Posted July 14, 2006 Share Posted July 14, 2006 Do you have an FSM? That would tell you for sure. In my 77 it was definitely part of the combo relay you mentioned. In my 78 it's seperate. I would definitely run your own relay. Quote Link to comment Share on other sites More sharing options...
love-my-V8-280Z Posted August 16, 2006 Share Posted August 16, 2006 I would bet there is relay, They would not want to run that much current thru the key. Find a wiring diagram and it will show you. My 78 does have a relay and i think it was under the passanger seat Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted August 16, 2006 Administrators Share Posted August 16, 2006 Nobody knows? I'm starting to think the 75's fuel pump didn't have a relay, and maybe just was wired to a 12volt hot. Hi, Its located under the dash, nearby the steering column. It looks about the size of two standard relays side-by-side. It has two plugs attached to it (becuase its actually two releys, main and fuel pump) If memory serves, one plug is black and one is clear. HTH Quote Link to comment Share on other sites More sharing options...
COZY Z COLE Posted August 16, 2006 Share Posted August 16, 2006 Check Fig.12 of this link.....http://www.autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/1d/1d/80/0900823d801d1d80.jsp LARRY Quote Link to comment Share on other sites More sharing options...
twoeightythreez Posted October 2, 2006 Share Posted October 2, 2006 My 78 had the FPR under the hood, under the relay cover. I have a few pics attached to show. (in Megasquirt forum where I installed MSII to my 78) Keep in mind the Nissan relay is fed power all the time and recieves a ground to operate. (At least in my car, build date 5/78) Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted October 2, 2006 Administrators Share Posted October 2, 2006 My 78 had the FPR under the hood, under the relay cover. You'd be correct on a '78... but he DID say '75 Quote Link to comment Share on other sites More sharing options...
Rumnhammer Posted October 16, 2006 Author Share Posted October 16, 2006 Thanks for the replys, I just ran a new genaric relay with 10gauge wire right to the pump works great. Chris Rummel Quote Link to comment Share on other sites More sharing options...
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