Fuel Pump Delivery Volume, Checking (AWD)

Fuel Pump Delivery Volume, Checking -vehicles With 6-cylinder Naturally Aspirated Engine

Test requirements







- VAG1348/3A with VAG1348/3-2 and Container (fuel resistant)
- Container (fuel resistant)

Test requirements
- Battery fully charged (at least 12 volts)
- Fuel filter OK
- Ignition switched off

Test sequence

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.







- Connect VAG1348/3A remote switch with VAG1348/32 adapter cable to cavity for fuse 28 -arrow-.
- Open cover for fuse panel on driver's side under instrument panel.
- Remove fuse 28 from relay panel (left-row, fifth large fuse from top).
- Connect test probe to Battery Positive Voltage (B+).
- Remove fuel filler cap.







- Remove engine cover -arrows-.

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 line from fuel rail and use rag to catch escaping fuel.
- Connect test hose -arrow- 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).