Front Wheel Drive (FWD)

Fuel Pump Delivery Rate, Checking

Special tools, testers and auxiliary items







- VAG 1348/3A with VAG 1348/3-2
- Measuring container

Requirements for test:
- Battery voltage not less than 12 V
- Fuel filter OK
- Ignition switched off

Test sequence
- Open fuse box cover on left side of the instrument panel.
- Pull fuse No. S228 off fuse holder (left row, 5th large fuse from top).







- Connect remote control V.A.G 1348/3A with adapter lead V.A.G 1348/3-2 to right-hand fuse socket of fuse No. 28 -arrow-.
- Connect clamp to vehicle battery (+).
- Remove filler cap from fuel tank filler neck.







- Remove engine cover -arrow-.

WARNING:
- Fire Hazard. Do not smoke, work near heaters or have anything in the area that could ignite the fuel or fumes.
- Fuel supply lines are under pressure. Before loosening any lines, cover the connection with a rag. Release the pressure by slowly separating the connection.







- Disconnect fuel return hose from fuel rail.
- Connect extension (test) hose -arrow- to fuel rail and hold end of hose 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 line with new hose clamp.