Fuel System Leak Test
WARNING: This page is about a different car, the 2012 Audi S5, 2011 Audi S5, 2010 Audi S5, 2009 Audi S5, and 2008 Audi S5. 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 speed.
-- Turn off the ignition.
-- Check the entire fuel system for leaks.
-- Replace the part if there are leaks in spite of correct tightening specifications.
-- Perform a road test and press the accelerator pedal all the way down at least one time.
-- Then check the high pressure area again for leaks.