Fuel gauge problem

Talk and Tech about turbocharged 924/944/968 cars
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Belgian951
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Tiny update:

Yesterday I filled the car up with fresh gas and now the fuel gauge reads ABOVE the max capacity (about 1 mark above, if there would be a mark). When it was empty (I filled up just shy of 50 liters which is +- 13 gallons), the fuel gauge read 4/5th full.

So...

-> Tank completely full: gauge beyond full mark
-> Tank almost completely empty: gauge 4/5th full with orange indicator light pretty faintly shining


Next step, refill the tank and get a reading from the fuel gauge in the tank?
1986 944 Turbo Garnet Rot Metallic

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Darwin
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Belgian951 wrote: Mon Apr 07, 2025 12:35 am Tiny update:

Yesterday I filled the car up with fresh gas and now the fuel gauge reads ABOVE the max capacity (about 1 mark above, if there would be a mark). When it was empty (I filled up just shy of 50 liters which is +- 13 gallons), the fuel gauge read 4/5th full.

So...

-> Tank completely full: gauge beyond full mark
-> Tank almost completely empty: gauge 4/5th full with orange indicator light pretty faintly shining


Next step, refill the tank and get a reading from the fuel gauge in the tank?
You should have a 21.7gal tank (rougly 82 liters). Are you sure you were empty? Still doesn't explain the offset reading, but how were you gauging fuel level?
1984 VW Rabbit Pick-up - Not stock
1988 944 Turbo S - Really not stock (Chris White special)
2012 VW Tiguan - Kinda stock
2013 Cayenne Base - 6 Speed! Tastefully modified, mostly stock

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Belgian951
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Darwin wrote: Mon Apr 07, 2025 5:58 am
Belgian951 wrote: Mon Apr 07, 2025 12:35 am Tiny update:

Yesterday I filled the car up with fresh gas and now the fuel gauge reads ABOVE the max capacity (about 1 mark above, if there would be a mark). When it was empty (I filled up just shy of 50 liters which is +- 13 gallons), the fuel gauge read 4/5th full.

So...

-> Tank completely full: gauge beyond full mark
-> Tank almost completely empty: gauge 4/5th full with orange indicator light pretty faintly shining


Next step, refill the tank and get a reading from the fuel gauge in the tank?
You should have a 21.7gal tank (rougly 82 liters). Are you sure you were empty? Still doesn't explain the offset reading, but how were you gauging fuel level?
Well the orange indicator was on so I assumed I was empty. It's possible that it wasn't completely empty. Going on the prices today and rechecking my banking account, I filled up 54.74 liters (14.46 gallon).
1986 944 Turbo Garnet Rot Metallic

#13

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Darwin
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Belgian951 wrote: Mon Apr 07, 2025 7:48 am
Darwin wrote: Mon Apr 07, 2025 5:58 am
Belgian951 wrote: Mon Apr 07, 2025 12:35 am Tiny update:

Yesterday I filled the car up with fresh gas and now the fuel gauge reads ABOVE the max capacity (about 1 mark above, if there would be a mark). When it was empty (I filled up just shy of 50 liters which is +- 13 gallons), the fuel gauge read 4/5th full.

So...

-> Tank completely full: gauge beyond full mark
-> Tank almost completely empty: gauge 4/5th full with orange indicator light pretty faintly shining


Next step, refill the tank and get a reading from the fuel gauge in the tank?
You should have a 21.7gal tank (rougly 82 liters). Are you sure you were empty? Still doesn't explain the offset reading, but how were you gauging fuel level?
Well the orange indicator was on so I assumed I was empty. It's possible that it wasn't completely empty. Going on the prices today and rechecking my banking account, I filled up 54.74 liters (14.46 gallon).
Unless Euro 951s have a different gas tank than their US counterparts that puts you at roughly 40% remaining. Really weird problem for sure! Sorry I don't have any advice :/
1984 VW Rabbit Pick-up - Not stock
1988 944 Turbo S - Really not stock (Chris White special)
2012 VW Tiguan - Kinda stock
2013 Cayenne Base - 6 Speed! Tastefully modified, mostly stock

#14

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