I'm helping a buddy of mine with his build. He has a 2006 350z with a fully built 4.2 stroker with the APS extreme twin turbo kit. He also has the APS dual pump return fuel system. Now, I'm a Mustang guy, so i'm new to the Z world.

Anyway, the problem we are having, is that when we plug the fuel system relay in, the pump runs at all times...even with the key off. I have started to diagnose the problem, however I need a diagram of the APS fuel system. I have tried APS's website and have been unsuccessful. Does anybody here have a decent diagram to help us resolve this issue?
Thanks

 

Directly from APS' site...

Fuel System Install Instructions

or pdf format off their site.

http://www.airpowersystems.com/350z/...tall/guide.pdf

 

Thanks for the response, but I have looked at that instruction sheet, and it doesn't tell me what I need to know. I am trying to find out what the 5 wires that go into the relay are all supposed to do. BTW, this is Ashton's car, which you guys will be tuning later this month. As of right now, 3 of the wires going to the relay are hot at all times, the other two don't get power even when the key is on. I'm trying to find out why he has no ignition lead to the relay.

 

Figured that much. Do you have all the stock wiring from Ashton's car? The 5 wire plug that goes into the stock hanger?

 

I'm sure they do somewhere. I'll have to ask him. But, it was my understanding that the fuel system from APS has a whole new harness and everything. How would the stock wiring harness help?

 

So, I just figured it out. When they wired up the fuel system a few weeks ago, they did it wrong. The main red wire that comes out of the tank that has to plug into the relay...they had it in the wrong spot on the connector. I was looking at the relay and they had it on a constant hot circuit. I simply moved it to the switched circuit and it works just fine.

 

wiring relays is electronics 101. very basic stuff. glad you figured it out.

I could only imagine the eye roll that IP had when you said, oh ya were are bringing this to you guys to tune.

LOL

 

Well, the owner of the car and his friends have been doing all the work. I just got to working on it the other day. I'm not a wiring expert or anything, but I know enough to get me by. I just find it easier looking at a wiring diagram and breaking everything down wire by wire.

 

i have the same problem go to oreily and ask for the relay, test it out to make sure it work, or u can swap out the connector from the open to close diagram to make any relay work, also u need 2 relay bc the aps kit drain alot of voltage