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Fuel gauge showing half way when empty
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Author:  brett [ Sat Jun 09, 2018 4:59 pm ]
Post subject:  Fuel gauge showing half way when empty

HI guys, I have a fuel gauge issue, its showing half, even though the tank is empty..... I have a new float in the tank ( and sender unit) also I disconnected the wires and its still going to half way....

Any ideas? I am thinking it has to be the voltage regulator the Temp gauge is working fine though
MK1 Cooper S
Cheers Brett

Author:  Mick [ Sat Jun 09, 2018 5:04 pm ]
Post subject:  Re: Fuel gauge showing half way when empty

When you turn the ignition off does it remain at half?

Author:  brett [ Sat Jun 09, 2018 5:10 pm ]
Post subject:  Re: Fuel gauge showing half way when empty

no it goes back to below the E mark

Author:  Convertible Mini [ Sat Jun 09, 2018 5:11 pm ]
Post subject:  Re: Fuel gauge showing half way when empty

I know an Auto Electrician that can fix that...

Author:  brett [ Sat Jun 09, 2018 5:14 pm ]
Post subject:  Re: Fuel gauge showing half way when empty

Convertible Mini wrote:
I know an Auto Electrician that can fix that...

Does an AutoElectrican want to Drive 600km? :P Im thinking its the Voltage regualtor as mine is old as

Author:  gtogreen1969 [ Sat Jun 09, 2018 5:25 pm ]
Post subject:  Re: Fuel gauge showing half way when empty

Run an ohm meter over the sender to check it goes from around 260ohms empty and 20 ohms full.

Check to see if you have 10V from the stabilizer. It will be on/off voltage. 13V DC means the stabilizer has gone closed circuit.

If that all checks out ok then you can try adjusting the gauge through the slots in the back.

Author:  brett [ Sat Jun 09, 2018 5:32 pm ]
Post subject:  Re: Fuel gauge showing half way when empty

yeah the thing that has me thinking is the Even disconnected the 2 wires from the tank its still showing half, so it has to be at the gauge to to stabilizer

Author:  Mick [ Sat Jun 09, 2018 5:45 pm ]
Post subject:  Re: Fuel gauge showing half way when empty

The gauge grounds through the tank sender, so with it disconnected then it is partially grounding either within the gauge, or between the gauge and the back of the car.

Is it somehow connected to a gauge lamp?

Author:  brett [ Sat Jun 09, 2018 5:49 pm ]
Post subject:  Re: Fuel gauge showing half way when empty

The sender is a bit rusty. So will check it out. Also ive had the trimmers do the dash perhaps they have done something

Author:  brett [ Sat Jun 09, 2018 11:16 pm ]
Post subject:  Re: Fuel gauge showing half way when empty

Mick was the winner! a lamp had fallen out during the retrim of the dash and was sitting on the gauge!

Thanks so much for everyones help!

Author:  brett [ Sat Jun 09, 2018 11:20 pm ]
Post subject:  Re: Fuel gauge showing half way when empty

and while I was at it, I found a rattle that I have never been able to trace, and was always blaming the heater or the front grill! so wins all round!

Author:  Mick [ Sun Jun 10, 2018 8:42 am ]
Post subject:  Re: Fuel gauge showing half way when empty

Good work!

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