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D2 - Everything else Anything that doesnt fit elsewhere

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Old 8th November 2020, 05:03 PM
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johnny_quattro johnny_quattro is offline
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We may both be out of luck then, if my garage did it properly... I remembered that I saw a post by moltuae from a while back and I'm sure he had the whole tank replaced.

Found the post: http://forum.a8parts.co.uk/showthread.php?t=12072

I'm not sure I can stomach that expense right now so I'll keep my 5-litre can in the boot if the garage don't find anything wrong.
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Old 9th November 2020, 07:49 AM
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Quote:
Originally Posted by johnny_quattro View Post
I remembered that I saw a post by moltuae from a while back and I'm sure he had the whole tank replaced.
I did. With hindsight (and the right info) it was probably fixable but I'd had enough. 2 different garages, numerous mechanics and I think 3 (or maybe 4) attempts to fix it. I even had a go myself, which quickly turned into one of those 'I wish I hadn't started this' sort of jobs -- Spending a Sunday contorted in the boot, swearing and high on petrol fumes is not my idea of fun.

And to add to the frustration, with every failed attempt to fix it came the testing period and the embarrassment of having the car splutter to a halt, usually at the most inconvenient times, and then having to add a little petrol from a jerrycan to get me to the nearest petrol station.
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Old 9th November 2020, 08:53 AM
Nognar Nognar is offline
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Interesting article here on another owner with the fault.

https://www.audizine.com/forum/showt...mystery-solved
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Old 9th November 2020, 09:50 AM
MikkiJayne MikkiJayne is offline
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The implication there is that, assuming the pump is seated correctly, that the long bolt simply isn't tight enough and thus isn't compressing the D-shaped gasket and allowing air in to the pump. That would suggest some sort of lubricant is needed on the bolt thread which is compatible with petrol but which doesn't dissolve in petrol.
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Old 9th November 2020, 04:30 PM
Nognar Nognar is offline
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Its an interesting post but for me I ran out at half a tank before I changed the pump but after the battery/ alternator died. Though it could be pump died in the first instance, then when replaced it did not seat/ seal perfectly and its sucking up air.

Currently plan is to circle locally burning off fuel to see what happens, good news is an S8 on short journeys can be quite thirsty so it should not take long

Luckily the car is a "Hybrid" as its got LPG so I can swap over to get me home when it happens, also with a Jerry Can in the boot I also consider it a Range Extender.
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Last edited by Nognar; 9th November 2020 at 04:40 PM.
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Old 13th November 2020, 02:48 PM
Nognar Nognar is offline
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Currently still circling in Sport mode locally like a Jumbo Jet burning off fuel to see what happens.

Previously the car stopped and would not start again with a little over half a tank of petrol.

As of now its running on petrol no problems with a little under half a tank so we will see!
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Old 15th November 2020, 09:05 AM
Nognar Nognar is offline
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Long drive yesterday and still going strong at now under 1/3 tank

Though of course it was all going too well...

Drove through a puddle and and the speedo died which is far from helpful, P0501 code on VAGCOM now with a failed Vehicle Speed Sensor. Never mind another job to do, I am assuming this is the one around the gearbox?

VAGCOM also confirmed no speed signal either is coming through.

ABS sensors all working and OK from each of the four wheels so I don’t think it’s that. Also without a working speedo, whilst everything else on the dash is OK it really upsets the fuel gauge without that speed signal.
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