Fuel tank problems

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Grrrmachine
E30 Zone Wiki / Team Member
E30 Zone Wiki / Team Member
Posts: 8043
Joined: Sat Feb 09, 2008 11:00 pm
Location: Warsaw, Poland

Fri Jun 26, 2015 8:40 pm

Just ran out of fuel 3km short of the German border... fortunately on the slip lane into the petrol station, so it was only a 100m push!

Fuel gauge still showed 20 litres left, and I could only get 40 litres into the tank no matter how slowly I pumped, and the gauge now reads full.

There's no dent in the tank and it's definitely a 63litre job since I fitted it myself. So i'm guessing there's a problem with the internal siphon system. Can anyone shed any light on this?

I was getting 32mpg, believe it or not!
KW355
E30 Zone Regular
E30 Zone Regular
Posts: 266
Joined: Sat Mar 29, 2014 11:00 pm
Location: Birmingham

Mon Jun 29, 2015 9:45 pm

It sounds like you have got a mismatched 55 litre / 63 litre fuel gauge / fuel gauge sender unit, especially as you have just changed the tank. did you transfer the original senders to your new tank ?
Grrrmachine
E30 Zone Wiki / Team Member
E30 Zone Wiki / Team Member
Posts: 8043
Joined: Sat Feb 09, 2008 11:00 pm
Location: Warsaw, Poland

Fri Jul 03, 2015 9:45 am

Nope, it's definitely the right tank and gauge. The gaugle says 60l, and since I fitted the tank myself I know it's the larger unit.

I'm thinking that one of the syphon pipes is blocked or crimped somehow, so there's 20l trapped on one side that I cant pump out.
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