Long Range Tank 4.8 GU 2004

There is both Chris

I have the long ranger 145lt main tank in my 2002 manual 4800 , and have the 75lt export model as a sub in my auto 2010 4800 (these cars came without a sub).

I have a unichip but is doesn't work well with the 2002 manual motor.

These types of things work by setting a manual 8 degree advance over standard and then the chip removes the advance as appropriate while adjusting the fuel level at each point.

Problem is that my car cannot work properly with a set + 8 degree advance over standard - everynow and then the ECU looses control of the idle and it will idle at anywhere beteew 1500 - 2200 rpm.
Hence mostly I run without it

So if you go down this path , advance the ignition 8 degrees first and run the car for a couple of weeks as a test.

Note this issue doesn't appear as much of a problem in autos.

Vicar,

Long ranger do a main replacement (145)and auxiliary tanks(75) giving a total of 220 ltrs.

My old 4.8 used to get around 900km out of the two tanks and I found there was always about 10 litres left in both that the fuel pickup could never pump.

I averaged 22-25L per 100 no matter how I drove it & I could never reach the figures Robin states. Not saying there not true but in 4 years In my 06 I could never get any range past 950km, In saying that unfortunately I had to move my beloved GU on when I cracked the rear chassis (stat write off).

One thing to think of Chris is you should be careful when adding long range tanks for it puts extra stress on the coil towers of the GU breed, I also had polyairs and a twin wheel carrier hanging off the back which swiftly helped the problem along.
Looking back I wish I put the ATOC kit on to strengthen the chasis before spending a fortune on accessories that are now gone. Better to say glad I did than wish I did.

My 2 cents worth