Probably 2 things going on there.
1. Your fuel guage does not seem to be very accurate.
2. Fuel pump unit is tricky to seat properly to get the suction jet pumps working and sucking up fuel from the other side of tank. Usually it cuts out about1/4-1/3 but your guage seems to be wrong as well. Could be that your dash has wrong coding translating data from sensors incorrectly, one of the sensors could be faulty, extra resistance in wiring connections or maybe it needs a bit of adaption. From memory there should be +/- 15% adaption to gauge reading in adaption.
So to summarise when gauge is reading 50% it's actually 35% and at this point it cannot get fuel from the other side of tank because the pump is not seated correctly
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Currently 8less
2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D
8 history:
2006 A8 Sport 4.2TDI quattro SOLD,
1997 S8, reached end of life with gearbox failure
Last edited by ainarssems; 3rd July 2021 at 04:16 PM.
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