Fuel System Leak Test
WARNING: This page is about a different car, the 2022 Audi Q8, 2021 Audi Q8, 2020 Audi Q8, and 2019 Audi Q8. However, it is still accessible from the selected car via links, so may be relevant.
-- Let the engine run a few minutes at a moderate RPM.
-- Switch off the ignition.
-- Check the entire fuel system for leaks.
-- Replace the affected component if there are leaks in spite of correct tightening specifications.
-- Perform a road test and fully depress the accelerator pedal at least one time.
-- Check the high pressure system again for leaks.