Vehicle With Front Wheel Drive

Fuel pump delivery rate, checking - Vehicles with 4-cyl. Turbo engine and 6-Cyl. Engine

Special tools and equipment







- V.A.G 1318/17-1 Adapter







- VAG 1348/3A and VAG 1348/3-2
- Fuel-resistant measuring container

Requirements for test
- Battery voltage not less than 12.7 V
- Fuel filter OK
- The fuel tank must be at least 1/4 full.
- Fuel pressure regulator OK.
- Ignition switched off

Test sequence
- Open fuse box cover on the left side of the instrument panel.
- Pull Fuse in fuse holder -S228- out of plug-in position 28 of fuse carrier (left row, 5th large fuse from the top).







- Connect remote control VAG 1348/3A together with adapter cable VAG 1348/3-2 to right-hand fuse socket terminal of Fuse in fuse holder -S228- (plug-in position No. 28).
- Connect clamp to vehicle battery positive (+).
- Remove filler cap from fuel tank filler neck.

Sedan:
- Detach trim in luggage compartment.
- Fold down rear right seat backrest if necessary.

Avant:
- Remove 1/3 backrest, left.
- Remove left side trim of luggage compartment and protective pan.

All models:







- Detach cover for flange -arrows-.


WARNING: The fuel system is under pressure. Before opening the system, place a cloth around the connection. Then release pressure by carefully loosening the connection.







- Disconnect fuel return pipe -arrow- (press release tab).


NOTE: The fuel supply pipe -1- remains connected.







- Fit adapter V.A.G 1318/17-1 onto disconnected fuel return pipe and hold pipe in measuring container.
- Operate remote control for 15 seconds (keep button pressed).







- Compare the quantity of fuel delivered with specification.
*) Minimum delivery cubic centimeter/15 seconds
**) Voltage at fuel pump with engine stationary and pump running (approx. 2 volts less than battery voltage).

- Connect fuel return hose.