Fuel, Checking Delivery Quantity, Vehicles With 3.0L TFSI Engine

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Special tools and workshop equipment required

Pressure Tester Kit VAS6550 with hose lines Pressure Tester Kit - Hose 1 VAS6550/1 and Pressure Tester Kit - Hose 2 VAS6550/2
Vehicle Diagnostic Tester
Measuring container, fuel-resistant

Procedure

Fig 1: Identifying Fuel Filler Cap (Fuel Cap)

Courtesy of AUDI OF AMERICA, LLC

-- Follow all test requirements, refer to TEST CONDITIONS .

-- Open the fuel filler door.

-- Remove the fuel filler cap -arrow-.

Fig 2: Identifying Version 2 Cylinder Bank 1 (Right)

Courtesy of AUDI OF AMERICA, LLC

WARNING:

Risk of injury from fuel.

To reduce fuel pressure, lay cloths around connecting point before opening fuel system and carefully loosen.

-- Press the release buttons and disconnect the fuel hose -1-.

NOTE:

Ignore the -arrows-.

-- Connect the Pressure Tester Kit VAS6550 with the Pressure Tester Kit - Hose 2 VAS6550/2 to the fuel supply line.

Fig 3: Holding Test Kit Adapter Hose Into Fuel-Resistant Measuring Container

Courtesy of AUDI OF AMERICA, LLC

-- Connect the Pressure Tester Kit - Hose 1 VAS6550/1 and hold the hose in a fuel-resistant measuring container.

Fig 4: Identifying Pressure Tester VAS 6550 And Shut-Off Valve -B- (Closed)

Courtesy of AUDI OF AMERICA, LLC

CAUTION:

Risk of fuel leak.

Make sure that the drain -C- is closed.
The lever is perpendicular to the direction of flow.

-- Open the shut-off valves -A and B-.

The levers point in the direction of flow.

-- Connect the Vehicle Diagnostic Tester.

-- Turn on the ignition and select the following menu items on the Vehicle Diagnostic Tester:

OBD
Engine Electronics
Basic Setting
Empty Fuel Tank

NOTE:

In order to measure the fuel delivery rate, there must be an initial pressure inside the fuel line against which the fuel pump must work during the measuring. Adjust the initial pressure using the Pressure Tester Kit VAS6550 as follows:

-- Press Start and create an initial pressure in the fuel system: the fuel pump starts to run and slowly close the shut-off valve -B- on the pressure tester.

Fig 5: Identifying Pressure Tester VAS 6550 And Shut-Off Valve -B- (Closed)

Courtesy of AUDI OF AMERICA, LLC

Specified value: 4 bar (58 psi) pressure.

-- From this point on do not move position of shut-off valve.

-- Press the Stop button.

-- Empty measuring container.

-- To measure, press the Start button again and let the fuel pump run for 15 seconds.

-- After 15 seconds, press the Stop button.

-- Check the amount of fuel in the measuring container.

Specified value: minimum delivery rate 800 cm³ /15 s.

If minimum delivery quantity is not obtained, the following malfunctions may be present:

The fuel lines are pinched.
The fuel filter is clogged.
The fuel pump is faulty.

Assembly is performed in the reverse order of disassembly, noting the following:

-- Attach the fuel line so that it clicks into place.

-- Press the fuel line on again and pull to make sure the connection is engaged correctly.