Fuel System Leak Test
WARNING: This page is about a different car, the 2015 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
-- Let the engine run at idle for a few minutes.
-- Do not use accelerator and then stop the engine. The fuel system bleeds itself.
-- 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 fully depressing the accelerator pedal at least one time.
-- Check the high pressure system again for leaks.