Fuel Pump Delivery Rate, Checking

Fuel Pump Delivery Rate, Checking

Special tools, testers and auxiliary items required

• Measuring container, fuel-resistant

Test conditions:

• Battery voltage at least 12.5 Volts

• Fuel filter OK.

• Fuel tank at least 1/2 filled.

• Ignition switched off

Fuel Delivery, Checking

- Remove engine cover. Refer to => [ Engine Cover ] Service and Repair.

- Remove the noise insulation from the cylinder head cover.


• Follow the guidelines for a clean working environment when working on the fuel system. Refer to => [ Fuel System ] Fuel System.

• Always follow these rules before and during work.

• Before opening the fuel system, lay a clean cloth around the connection point and carefully loosen it, which lowers the pressure.

- Remove the fuel supply line - arrow - from the high pressure pump.






- Hold the fuel supply line - 1 - inside the measuring container - 2 -.






- Connect a vehicle diagnosis tester.

- Switch ignition on.

- Select "engine electronics" in OBD.

- Then select "basic setting".

- Select "display group 35".

- Press the "activate" button.

- The fuel pumps start.

- Let the fuel pumps run for 15 seconds and then stop the activating.

• Specified value within 15 seconds: 500 ml minimum

If minimum delivery quantity is not obtained, the following malfunctions may be present:

• 15 seconds not reached

• Fuel lines pinched

• Fuel filter clogged

• Fuel pumps faulty: Check

• Check fuel system for leaks.