GU Auxillary tank

Basically, you are correct on that count.

The Nissan system is really stupid. I think it was a political thing... Toyota says TomAAto, Nissan says TomAeto.

I've been working on a solution that is plug-and-play for a few months now.

The biggest problem with the system is that there appears to be tight integration of the factory system.. Something of which I'm trying to sercumvent now with some PIC processors and a little software.

Once I've figured that out and have figured out where to get the cable connectors for the factory's Molex connectors, then I might be able to let people know about the designs and such.

Roachie,

The way I used to do a aux tank on a GQ diesel, was to fit a "6 port soleniod.

The way it worked,
From the aux tank, a pick up and return fuel hose would go to the 6 port soleniod
A pick up and return fuel hose from the main tank would also go to the 6port soleniod (6ps).
From the 6ps a fuel hose would go to the pump on the motor and a return hose back to the 6ps
A 2 way switch was fitted to the dash
In the main tank postion on the switch the 6ps would pick up fuel from the main tank and return the the excess fuel to the main tank.
The same would happen when the switch was in the aux postion, but would use the aux tank for pick up and return.

What I am not sure of is where is the transvere pump located, in the tank or outside. If the pump is inside the tank it might have to be removed and the pick up pipe extended to reach the bottom of the tank.

A 6 port soleniod should be avaiable from any 4WD shop that does tanks.

This set up will not work on petrol motors because the high pressure pump is located in the main tank, so all the fuel from the aux tank has to go through it.

If you are getting a larger tank fitted talk to the fitter and see if he/ she can fit it up the way I described.
If all else fails email me on the Member Msg.

Wayne

Hi all , K&N Fabrications have a replacement tank for the GU which is a straight pump from either tank , it replaces the sub tank and goes right across the chassis ,their email knfabrications@bigpond.com they are in WA Kelmscott

Yeah I thought the Patrols would have gone that way because of an expensive computer controlled high pressure fuel pump or some such jobby. That's why they pump the fuel into the main tank so as to not have two expensive pumps. But then again I know absolutally nothing of these setups, JMHO from driving a 3.0l at work.