Open Fuel Injectors, Checking: Assembling

WARNING: This page is about a different car, the 2016 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

-- Inspect the O-ring on the fuel return line connection for damage or deformation.

Replace the O-ring if is it Damaged or Bent.

NOTE:

Lubricate all of the O-rings with assembly oil or engine oil before installing.

-- Carefully press the return line connections over the sealing ring and onto the fuel injector. The connection must engage audibly. Then press the release pin down carefully.

Fuel System Leak Test

-- Let the engine run a few minutes at idle without pressing the accelerator pedal and then stop the engine. The fuel system bleeds itself.

-- Check the entire fuel supply system for leaks.

Replace any leaking parts.

-- Perform a road test where the accelerator pedal is pressed all the way down at least one time. Then check the high pressure area again for leaks.

-- Install the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .