Fuel System, Filling and Bleeding

Fuel System, Filling and Bleeding

Special tools, testers and auxiliary items required

• Adapter for K-jetronic Test Device (V.A.G 1318/20)

• Suction Pump (VAS 5226)

• Vehicle Diagnostic Tester

• If the fuel supply system was opened, it must always be bled before starting the engine.

• If the fuel supply system is not bled, the catalytic converter will be damaged.

• Follow all safety precautions. Refer to => [ Safety Precautions ] Safety Precautions.

• Pay attention to the rules of cleanliness. Refer to => [ Clean Working Conditions ] Clean Working Conditions.

Procedure

The fuel system is under pressure!

• Always wear protective eyewear and protective clothing to prevent injuries and fuel from coming in contact with your skin.

• Before loosening line connections, place a cloth around the connection point. Then release pressure by carefully disconnecting the connection.

- Remove the cap - arrow - from the bleed valve.






- Turn the T-piece on the adapter for K-jetronic test device (V.A.G 1318/20) counterclockwise - arrow - until it is completely open.






- Install the adapter (V.A.G 1318/20-1) onto the adapter for K-jetronic test device (V.A.G 1318/20).

- Install the adapter for K-jetronic test device (V.A.G 1318/20) hand tight on the bleed valve.

- Connect the hose from the suction pump (VAS 5226) as shown.






- Turn the T-piece clockwise into the bleed valve until it stops.

- Check the adapter and hose connection for leaks.

Connect the vehicle diagnostic tester as follows:

- Connect the diagnostic cable connector - 2 - to the Data Link Connector (DLC) in the driver's footwell.






- Press the following buttons on the display one after another:

OBD

OBD ->

Engine electronics ->

Output diagnostic test ->

- Keep pressing -> until the fuel pump relay (J17) activates. This activates the fuel pump. Allow the diagnostic to run until fuel without bubbles runs out of the bleed valve. Then end the output diagnostic test mode.

• If the output diagnostic test mode is interrupted, the engine must be started for a short time before the mode can be accessed again. The output diagnostic test mode is automatically cancelled after 60 seconds.

- Turn the T-piece counterclockwise - arrow - until it is completely open again.






- Clamp off the hose on the suction pump (VAS 5226) (using for example, hose clamps up to 25 mm dia. (3094) ) and disconnect the hose from the adapter (V.A.G 1318/20-1).

- Remove the adapter for K-jetronic test device (V.A.G 1318/20) from the bleed valve.

- Install the cap - arrow -.