2. To relieve pressure in the fuel system, disconnect the fuel pump connector, start the engine and wait until it stops due to the exhaustion of fuel from the fuel lines and fuel line.
Note. Before disconnecting the fuel lines, depressurize the fuel system, otherwise pressurized fuel will flow rapidly from the fuel system.
3. Disconnect a wire from the negative plug of the storage battery and connect a socket of the fuel pump.
4. Connect the pressure gauge adapter to the fuel filter (09353–24000, 09353–24100, 09353–38000) and tighten the adapter mounting bolt to the required torque.
Tightening torque: 25–35 Nm
5. Connect a wire to the negative plug of the storage battery.
6. Apply voltage to the fuel pump connector with additional wires and check that there are no fuel leaks from the pressure gauge connections.
7. Start the engine and let it run at idle speed.
8. Measure fuel pressure.
Fuel pressure: 350 kPa
9. If the measurements made in steps 7 and 8 do not correspond to the required fuel pressure, determine the cause and make the necessary repairs.
Condition | Probable Cause | Elimination Method |
Fuel pressure | A. Fuel filter dirty. | A. Replace fuel |
too low | b. Leaks from the return side of the top | filter. |
spillage caused by poor sealing | b.Repair the leak or | |
pressure regulator. | replace fuel pump | |
Fuel pressure | A. Pressure regulator sticking | A. Replace Regulator |
too high | fuel. | pressure. |
b. Clogging or pinching of the top | b. Replace the fuel | |
fuel line or fuel return hose. | wire or hose |
10. Stop the engine and after 5 minutes read the fuel pressure value on the pressure gauge, which should not change. If the fuel pressure has dropped significantly, determine the cause and make the necessary repairs.
11. Relieve pressure in the fuel system.
12. Disconnect the hose and pressure gauge.
Warning
Cover the connection with a towel to prevent splashing of fuel caused by residual pressure in the fuel line.
13. Replace the O-ring at the end of the hose.
14. Connect a hose to a fuel highway and tighten a connecting nut the demanded moment.
15. Check up tightness of fuel system.