Fuel System, Performing Leak Test
WARNING: This page is about a different car, the 2010 Audi Q7, 2009 Audi Q7, 2008 Audi Q7, and 2007 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.
-- Let engine run a few minutes at average RPM.
-- Switch off ignition.
-- Check entire fuel supply system for leaks.
-- Replace the part if there are leaks in spite of correct tightening specifications.
-- Perform a road test. Press the accelerator pedal all the way down at least once.
-- Then, check the high pressure areas for leaks again.