Fuel Tank, Filling With Fuel After Installing High Pressure Pump

WARNING: This page is about a different car, the 2016 Audi Q5, 2015 Audi Q5, and 2014 Audi Q5. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

Letting the high pressure pump run dry will damage it.

The high pressure pump must be filled with fuel after installing, but before the engine is started for the first time.

Special tools and workshop equipment required

Vehicle Diagnostic Tester

Procedure

Check the fuel gauge in the instrument cluster. The gas needle must not be in the reserve area.

-- Vehicle Diagnostic Tester Connect.

-- Turn on the ignition.

-- Select "engine electronics" in On Board Diagnostics (OBD).

-- Then select "basic setting".

-- Select "checking the transfer fuel pump".

-- Push "Start" button: the fuel pump starts.

-- Let the fuel pump run for 3 minutes.

-- Start the engine after filling the fuel system.

-- Let the engine run for a few minutes at an average RPM and then shut it off.

-- Check fuel system for leaks.

-- Erase the Diagnostic Trouble Code (DTC) memory.

-- 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.

NOTE:

If there is still air in the fuel system, the engine may switch to emergency mode during the road test. Turn off the engine and erase the DTC memory. Then continue the road test.

-- Check the DTC memory.