Fuel Delivery Rate, Checking, A5 Through MY 2011, A4 Through MY 2012

Fuel Delivery Rate, Checking, A5 through MY 2011, A4 through MY 2012






Special tools, testers and auxiliary items required

• Pressure gauge K-Jetronic (V.A.G 1318)

• Adapter (V.A.G 1318/11)

• Adapter (V.A.G 1318/17-1) from Adapter for VAG 1318 (V.A.G 1318/17)

• Double connection (V.A.G 1318/23)

• Remote Control (V.A.G 1348/3A) with adapter cable (V.A.G 1348/3-3)

• Connector test set (V.A.G 1594C)

• Measuring container, fuel-resistant

Procedure






- Follow all test requirements. Refer to => [ Test Conditions ] Initial Inspection and Diagnostic Overview.

- Remove the rear seat bench.

- Remove the locking flange cover - arrows -.

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






- Connect the remote control for V.A.G 1348 (V.A.G 1348/3A) using the adapter (V.A.G 1348/3-3) and cable from the connector test set (V.A.G 1594C) to the terminal - 1 -.






- 2. Tape adapter cable connector terminal (V.A.G 1348/3-3) with insulating tape - arrow - to prevent a short circuit.

- Connect the connector terminal - 5 - to the chassis ground with an adapter cable from the connector test kit (V.A.G 1594C).

- Route VAG 1348 Remote Control (V.A.G 1348/3A) toward front in engine compartment.

- Remove the center plenum chamber cover.






- Release the retainer - arrow A - and open the cover - arrow B -.






- Connect the alligator clip to the battery jump start terminal (U6) - item A - in the terminal 30 wire junction 2 (TV22) in the plenum chamber.






- Open the fuel filler door.






- Remove the fuel filler cap - arrow -.








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.

- Pull the release ring - 1 - and disconnect the fuel line - 2 -,

- Attach Fuel Line Feed Adapter (V.A.G 1318/23) and adapter (V.A.G 1318/17-1) to Fuel Inj. Pressure Gauge-CIS (V.A.G 1318).






- Install the adapter (V.A.G 1318/17-1) on the disconnected fuel supply line.

- Attach Adapter (V.A.G 1318/11) to Fuel injection. Pressure Gauge-CIS (V.A.G 1318).

- Push an assisting hose - arrow - onto it and hold it into a measuring container.

- Open the shut-off valve on the pressure gauge.

• The lever points in the direction of flow.

- Generate pressure in the fuel system by pressing the switch on the remote control and slowly closing the shut-off valve on the pressure gauge.

• Specified value: 4 bar positive pressure.

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

- Empty measuring container.

- Press the remote control switch for 15 seconds.






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

• 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.

Assemble in reverse order of disassembling. Note the following:

- Remove the pressure gauge K-Jetronic (V.A.G 1318) and the hose lines.

- Install the right locking flange cover => [ Locking Flange Cover - Tightening Specifications ] Fuel Tank With Attachments Overview.

- Install the rear seat bench.