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| D2 - Fuel and Exhausts Everything to do with getting fuel into the engine, and fumes back out again |
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#1
30th January 2014, 08:19 PM
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Fuel gauge with a mind of it's own...
Hi,
My A8 has a bit of a fuel gauge issue after it gets below between a half tank and a quarter tank - it basically sits there for ages, then drops down to empty, and then moves about and obviously is very untrustworthy at that point. Is it just a sensor issue? Thanks 
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#2
30th January 2014, 10:10 PM
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Well, new cluster 100-135 pounds ! so wouldn't start there
VCDS would be where I would start unless its one of the odd common issues with D2s known to other D2 owners in here Don't know what to say more really
__________________
 2006 D3 S8 5.2 V10 Ceramic Brakes, Bang&Olufsen, DTV, DAB, Rear Camera, BT, TPMS, Soft Close, Auto Boot, AMI , 4 Zone AC, Home Link, All Electric Blinds, Fingerprint, Ski Hatch, Black Extended Leather, Heated Sport Seats, Alacantra, Carbon Trim inc Aluminium Pack 2. 2015 A3 S line 1.4 TFSI - for the missus to keep her away from my car. Standard S-line equipment, no extras. 2006 D3 A8 3.7 V8 - SOLD but not forgotten
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#3
31st January 2014, 06:34 AM
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You might have a problem with your fuel pump or its installation.
The fuel tank is basically two halves, well not quiet halves. When the fuel drops to a certain level the car starts to pump fuel from one side to the other so the pickup has enough fuel to run the car. That level is between half and quarter somewhere. I do know that if the pump is improperly installed, when you get to that key point then the engine usually stalls because it runs of of fuel even though you have loads in the tank. Could just be a problem with the sender as well, its easy to get to and check. Remove the boot carpet, and you'll see a metal plate to the rear on the right hand side. Remove the screws and the cover, and you'll see the fuel pump and the cap for the sender. Have a read of my thread below where I had to take it apart to fix a seal, it has some links and several pictures on how to access the sender. http://forum.a8parts.co.uk/showthread.php?t=4645
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Manny 2004 A4 1.8T Sport Cabriolet, 89K Miles Past 2004 D3 A8 3.7 Quattro, Xenon, Bose, Blinds, Solar Sunroof, TV, ACC, phone and almost every option. 168K miles rising slowly with retrofit AMI and DVB-T in place of Analogue 2003 Volvo S60 D5 SE Manual, 197K miles. 2001 D2 A8 3.7 QS, Bi-Xenon, Bose, Blinds, Electric Everything, retrofitted RNS-D, 191K Miles
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#4
31st January 2014, 08:44 AM
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Thanks for the advice, it doesn't stall or anything, and it doesn't feel starved of fuel or anything when it's below that point which makes me think it is more likely to be the sender. I'll have a look and see what happens.
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