Fuel, Checking Delivery Quantity, Vehicles With 3.2L FSI Engine

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Special tools and workshop equipment required

Injection Rate Comparison Meter Kit - Remote Cable VAG 1348/3A with Injection Rate Kit - Remote Cable VAG 1348/3-3.
Connector Test Set VAG1594D
Pressure Tester Kit VAS6550 with Pressure Tester Kit - Hose 1 VAS6550/1 and Pressure Tester Kit - Hose 2 VAS6550/2
Measuring container, fuel-resistant

Procedure

Fig 1: Identifying Locking Flange Cover & Bolts -Arrows-

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

-- Remove 1/3 of the rear seat, refer to REAR SEAT, REMOVING AND INSTALLING .

-- Remove the bolts -arrows- and remove the sealing flange cover -1-.

-- Disconnect the connector -1- on the sealing flange.

Fig 2: Identifying Connector -1- On Locking Flange

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-- Push the circlip -1- upward in direction of -arrow A- and squeeze the release in direction of -arrow B-.

Fig 3: Pulling Lock -1- Upward -Arrow A- & Press -Arrow B-

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-- Press on the marked location in direction of -arrow A- and remove the cover -2-.

Fig 4: Pressing On Marked Location -Arrow A- & Remove Cover -2-

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-- Release the latch in direction of -arrow B- and open the cover -1-.

-- Connect the Injection Rate Comparison Meter Kit - Remote Cable VAG1348/3A using the Injection Rate Kit - Remote Cable VAG1348/3-3 and cable from the Connector Test Set VAG1594D to the terminal -1-.

Fig 5: Connecting - VAG 1348/3A- Using - VAG 1348/3-3- & Cable From - VAG 1594C- To Terminal -1-

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-- 2. Tape the Injection Rate Kit - Remote Cable VAG1348/3-3 with insulating tape -arrow-.

-- Connect the connector terminal -5- to the chassis ground with an adapter cable from the Connector Test Set VAG1594D.

-- Place the switch for the Injection Rate Comparison Meter Kit - Remote Cable VAG1348/3A toward front in engine compartment.

-- Connect the alligator clip to the Battery Jump Start Terminal -U6- -A- in the Terminal 30 Wire Junction 2 -TV22- in the plenum chamber.

-- Open the fuel filler door.

Fig 6: Identifying Fuel Filler Cap (Fuel Cap)

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-- Remove the fuel filler cap -arrow-.

WARNING:

There is a risk of injury because the fuel is under high pressure.

To reduce pressure in fuel system, lay a clean cloth around the connector and carefully loosen connector.

-- Loosen the clamp and remove the fuel line -1-.

Fig 7: Locating Fuel Line -1-

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-- Connect the Pressure Tester Kit - Hose 1 VAS6550/1 and adapter hose -1- to the fuel supply line and secure them with hose clamps -2-.

Fig 8: Connecting Fuel Supply Line To Test Kit Adapter Hose

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-- Connect the Pressure Tester Kit - Hose 1 VAS6550/1 to the Pressure Tester Kit VAS6550.

Fig 9: Holding Test Kit Adapter Hose Into Fuel-Resistant Measuring Container

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-- Connect the Pressure Tester Kit - Hose 2 VAS6550/2 and hold the hose in a fuel-resistant measuring container.

Fig 10: Identifying Pressure Tester VAS 6550 And Shut-Off Valve -B- (Closed)

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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.

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 remote control as follows.

-- Press the switch in the remote control to create an initial pressure within the fuel system: the fuel pump starts and close the shut-off valve -B- on the pressure gauge slowly.

Specified value: 4 bar (58 psi) pressure.

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

-- Empty measuring container.

-- Press the remote control switch for 15 seconds.

Fig 11: Compare Quantity Of Fuel Delivered With Minimum Delivery Rate In Diagram

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-- Compare quantity of fuel delivered with minimum delivery rate in diagram (cm³ /15 s).

NOTE:

Voltage at fuel pump with engine stopped and pump running is approximate. 2 volts less than battery voltage.

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:

-- Secure the fuel line with a clamp and then pull on it to make sure it is secure.