Daewoo Musso. Manual - part 153

M162 ENGINE CONTROLS  1F1-51

Removal & Installation Procedure

1. Discharge the fuel pressure from the fuel pressure test

connector.

2. Disconnect the battery ground cable.

3. Disconnect the vacuum hose from the fuel pressure

regulator.

4. Remove the cable guide.

5. Remove the fuel return and supply line.

Notice

l

For removal, cover around parts with cloths not to be

stained by fuel.

l

In case of checking the injector only, do not remove the

fuel return and supply line.

Installation Notice

6. Remove the six injector connectors.

7. Remove the two left and two right bolts and one center bolt

of the fuel distributor assembly from the intake manifold.

Installation Notice

Tightening Torque

25 - 30 Nm

Tightening  Torque

22.5 - 27.5 Nm

1F1-52  M162 ENGINE CONTROLS

8. Remove the injectors and the fuel distributor carefully.

9. Installation should follow the removal procedure in the

reverse order.

10. Check for  fuel pressure and internal leakage by operating

the engine.

Fuel Pressure Test

1. Turn the ignition switch to "OFF" position.

2. Remove the fuel pressure test connector.

     Vacuum Hose Connected (bar)

    3.2 - 3.6

Vacuum Hose Disconnected (bar)             3.7 - 4.2

5. Replace the pressure regulator diaphragm if out of the

specification.

3. Connect the fuel pressure gauge to the fuel pressure test

connector.

4. Test the fuel pressure at idling by operating the engine.

M162 ENGINE CONTROLS  1F1-53

3. If there is no change in fuel pressure and maintain the

following pressure over 30 minutes, it is normal.

Internal Leakage Test

1. Connect the fuel pressure gauge to the fuel pressure test

connector.

2. Stop the engine for approx. 30 minutes and then check the

fuel pressure changes.

Fuel pressure

drops slowly

·

Fuel leakage at the
injector

•

Faulty fuel pressure
regulator's
diaphragm and O-
ring.

Fuel pressure

drops rapidly

•

Faulty check valve
in the fuel pump.

    Possible Cause

Pressure Change

Fuel  Pressure(bar)

  2.5

Discharging the pressure in fuel system

1. Remove the fuel pressure test connector.

Installation Notice

2. Remove the fuel pressure in fuel system by pressing the

service valve with a clean, pointy tool.

Notice

Place a cloth so that the fuel doesn't stain around.

Tightening  Torque

22.5 - 27.5 Nm

1F1-54  M162 ENGINE CONTROLS

INJECTOR

Preceding Work : Removal of fuel distributor

1 O-ring .................................... rplace, if damaged
2 Injector Bracket
3 Injector

4 O-ring .................................. replace, if damaged
5 Fuel Distributor