Auxiliary Fuel Pump V393 (In-Line Electric Fuel Pump)

Auxiliary Fuel Pump V393 (In-Line Electric Fuel Pump)

Special tools, testers and auxiliary items required

• Torque Wrench (5-50 Nm) (V.A.G 1331)

• Hose Clip Pliers (VAS 6362)


• Observe the safety precautions when working on the fuel supply system. Refer to => [ Safety Precautions ] Fuel Supply.

• Observe the rules for cleanliness. Refer to => [ Clean Working Conditions ] Fuel Supply.

Always follow these instructions before and during work.

Removing

- Disconnect the connector - 2 - from the exhaust pressure sensor 1 (- 1 -).






- Remove the bolt - 4 - and bracket - 3 - with the exhaust pressure sensor 1 - 1 - in the - direction of the arrow - and lay them aside (the control wires remain connected).

- Disconnect the connector - 1 - from the auxiliary fuel pump.






- Unclip the fuel hoses - 2 and 3 - from the bracket.

- Loosen the hose clamp using hose clip pliers (VAS 6362) and remove the fuel supply line - item 6 - in the => [ Fuel Filter Overview ] Fuel Filter Overview from the fuel filter.

- Disconnect the connector from the fuel temperature sensor - arrow -.






- Loosen the spring clamp - 1 - using hose clip pliers (VAS 6362) and remove the fuel supply line from the high pressure fuel pump.

- Seal the lines so that the fuel system is not contaminated by dirt, etc.

- Remove the bolts - arrows - and the auxiliary fuel pump.






Installing

Install in the reverse order of removal. When doing this note the following:

• Route the fuel hoses free of kinks.

• Ensure fuel hoses are seated securely.

• Do not interchange the supply and return lines (the return line is blue or has a blue mark, the supply line is white or has a white mark).

• Clip the fuel and coolant hoses back into the retainers.

Tightening Specifications

• Bolt for the exhaust pressure sensor 1 bracket, 8 Nm.

• Auxiliary fuel pump bolts, 20 Nm.

- Fill and bleed the fuel system. Refer to => [ Fuel System, Filling and Bleeding ] Fuel System, Filling and Bleeding.