Fuel Gauge Dropping

Pin,
You may want to give a bit more detail on your problem, a bit hard to understand exactly what your problem is..........for me anyway.

But if you mean why do both guages show a loss of fuel when both are full and you hav'nt used the sub tank?? In a GU NIssan (Diesel) each time you start the car a small amount of fuel is pumped from the sub tank into the main tank, I think it's to keep the sub tank pump lubricated.

Browny

Pin,
Not sure 100% if this is the same but on my 01 TD prado, if I park in a steep location the gauges will drop sometimes quite a lot but on return to the flat they settle back down again where they should be.
I am pretty sure the nissan system of always starting on the sub tank does not apply to yoda's, for us, which ever is selected is used.
Tim

Hi Pin,

This is normal on all Prado TDs, but they only drop a little. I thought it was only happens on the tank being used, but I'll have a closer look.

I'm guessing its a temperature effect on the sensor. As the engine warms up, the fuel that returns to the tank from the rotary pump gains some heat from wherever and the sensor in the tank reads a bit lower. But I may be totally wrong :-))

Great vehicle - mines been brilliant.

And Tim's correct. Theres no pumping between tanks as the Prado has separate systems for each tank, but there can be a bit of spillage from a full tank via the filler despite anti-reflux flaps in each tank.

Rarely a fuel return solenoid can stick, draining fuel from one tank and filling up the other tank!!!! Flick the changover switch a few times usually fixes this.

Cheers
Phil