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      04-14-2023, 11:48 PM   #3
sszablya
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Drives: 2011 F10 550xi
Join Date: May 2019
Location: Denver, CO

iTrader: (2)

The leak test can be carried out with a leak detector.
Possible causes may be:
- Tank cap leaking (check tank cap pressure relief valve)
- Tank ventilation lines leaky (fuel tank-activated carbon canister-tank ventilation valve)
- Tank ventilation valve leaky (engine compartment)
- Fuel level sensor flange on tank leaking
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