07 patrol ute zd30crd fuel gauge problem

[robewott]

Going into town yesterday my 3/4's of a tank went down to zero. Low fuel light came on and the sub tank light came on(which it normally does not). I checked underneath for a massive diesel leak but thankfully there was not one.
I can't turn on the sub tank & only the main tank gauge is affected.
Will the problem be around the solenoids or in the cabin?
For some reason the psi on my turbo seems to have got higher(10-13.5 @ 100k/h) I haven't noticed it to be that high before. Would the two be connected in anyway?

[4bye4]

Is the turbo pressure gauge mechanical or electric?

[robewott]

everything is standard

[4bye4]

Can only think if these things all happened at the same time, it could be a loose wire or earth problem. I would guess behind the dash, but thats only a wild guess, may be way off the mark. Check for fuses and loose wires. sorry mate, best I can offer from here. Maybe some others with may have seen this before and will join in. Good luck and have a good Christmas.

[robewott]

I have to remove the tray anyway and weld up the inside of the chassis so i'll start there and work forward.

[Yendor]

Possibly a damaged/cut wire......I would start by checking the main harness for damage, especially where it runs from the rear of the main fuel tank to the chassis.

[the evil twin]

I would be suprised if the boost pressure is related in any way.

The Sub Tank Warning Light will illuminate if there is a problem with the Main Tank Sender Unit "Not Full" test.

You will not be able to transfer fuel from the Sub whilstever that warning lamp is set

The symptoms sound like you have lost power to the Sender Unit.

Check the fuses (not sure which ones as I don't have a manual handy), if they are OK you could try an extra earth but the main tank earthing is normally pretty good.

There is a wiring loom connection on top of the tank that is worth checking as well

[robewott]

after crawling around in the dirt this morning, the problem is in the sender unit itself. There is no continuity through the unit. Both tanks have power to them & the sub tank has 5.4 ohms resistance(it is full). I cant find a unit on Feebay. Does anyone know where i can get a new one online?

[the evil twin]

When I was working on mine about 9 months ago it was 3 choices, New, Wreckers or fix the original.

Try Patrolapart or similar for a price and the wreckers if you don't stumble on one on the 'net

[robewott]

how difficult are they to repair?