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Thread: 2002 GT TDI: Misleading Fuel Level Information Reported on Dash!

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  1. Re: 2002 GT TDI: Misleading Fuel Level Information Reported on Dash! 
    #11
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    Part of the discussion. You yourself brought it up.
    2003 VW Golf Est 1.9 TDI 130
    2006 Audi A3 2.0 TDI Sport 140
     
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  2. Re: 2002 GT TDI: Misleading Fuel Level Information Reported on Dash! 
    #12
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    Quote Originally Posted by rjsdavis View Post
    Guys

    We're getting a bit caught up on pattern -v- gen. The point of the OP was to work out whether this was going to be the offending part to begin with! Is there anything else it could be, given the pattern of behaviour on the dash guage?
    The likelihood is that it's the sender unit in the tank.
    BUT, it could also be the wiring, or gauge unit, or anything else.
    I would go for the sender unit first.
     
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  3. Re: 2002 GT TDI: Misleading Fuel Level Information Reported on Dash! 
    #13
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    Quote Originally Posted by Alan G H View Post
    The likelihood is that it's the sender unit in the tank.
    BUT, it could also be the wiring, or gauge unit, or anything else.
    I would go for the sender unit first.
    Thanks Alan
     
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  4. Re: 2002 GT TDI: Misleading Fuel Level Information Reported on Dash! 
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    RESOLVED:

    In the end, no parts were required at all.

    I watched a video on how to remove and refit the unit on YouTube. (How to install a VW MK4 TDI Lift Pump and fuel level sender - YouTube)

    At about 3m 30secs, he talks about aligning the arrow on the top of the lifter directly towards the small hole in the car chassis, and states that if this is not aligned, the fuel level will read on the dash incorrectly. Sure enough, after the replacement fuel pump had arrived and I went to swap them out, I found that the present fuel lifter was incorrectly aligned in the car.

    Un-tightened it, aligned it correctly, tightened it back up and gave it back to my mum & sister to drive around and see if they could cause the yellow reserve fuel light to come on and for the car to correctly report that it was into the reserve tank. They were nervous about doing it, as they didn't trust the car (they did had a 5 litre spare tank in the boot), but eventually they gave it a go. Sure enough, the fuel gauge now appears to display the fuel level correctly!

    How annoying is that?

    My mother had her car attacked some years ago, some scalli's punctured the plastic fuel tank with screwdrivers to steal/drain the diesel. It would appear that after the replacement fuel tank had been fitted, the fuel lifter was re-fitted, but incorrectly aligned and had been reading incorrectly ever since...
     
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