Single-injector system sensors and devices — removal and installation (Opel Astra G)

Attention! Maintenance of the injection system is performed in a car service. It is allowed to change sensors and devices of the injection system independently.

Nozzle

1. Decompress the fuel system and disconnect the battery from ground.

2. Remove the air duct from the upper section of the throttle body, disconnect the hoses from the upper section, unscrew the screws and remove the upper section.

3. Remove the nozzle as shown in the photo.









4. Installation is carried out in reverse order. Replace the injector sealing rings.

Fuel pressure regulator

Attention!

• The fuel pressure regulator is changed together with the upper section of the throttle body.
• It is permissible to disassemble the regulator for cleaning, however, the pressure regulator should only be disassembled if absolutely necessary.

Material copied from the portal [OpelBook]


5. Decompress the fuel system and disconnect the battery from ground.

6. Remove the upper section of the throttle body by disconnecting the hoses and unscrewing the screws.

7. Mark the position of the regulator cover relative to the throttle pipe, unscrew the screws (see photo) and remove the cover. Remove the spring and membrane (see photo).





8. Wash the parts and check their condition.

9. Assembly is carried out in reverse order

Electric idle speed control

10. Disconnect the battery from ground, remove the upper section from the throttle body.

11. Remove the electric drive by disconnecting the connector and unscrewing the screws (see photo).





12. Installation is carried out in the reverse order. When installing, make sure that the dimension A does not exceed 28 mm to avoid breakage of the plunger of the electric drive motor (see photo). If necessary, carefully push the plunger into the actuator housing.

Throttle Position Sensor

13. Disconnect the connector from the sensor, which is located on the left side of the throttle pipe, unscrew the screws and remove the sensor (see photo). The sensor screws are tightened with a fixing compound.

Intake Manifold Pressure Sensor (MAP sensor)

14. The sensor is attached with a bracket to the bulkhead of the engine compartment, to the left of the throttle body (see photo).

Crankshaft angle sensor

15. The sensor is mounted in the front part of the cylinder block, on the side of the engine compartment bulkhead. Access to the sensor is provided from below

16. Disconnect the sensor connector from the harness, remove the sensor wire from the brackets.

17. Loosen the bolt and remove the sensor (see photo).



18. When assembling, check the gap between the end of the sensor and the tooth on the crankshaft pulley, which should be 1.0±0.7 mm. If the gap is not within the norm, replace the sensor bracket.

Knock sensor

19. The sensor is mounted at the rear of the cylinder block. Access to the sensor is provided from below.

20. Disconnect the sensor connector from the harness, remove the sensor wire from the brackets.

21. Loosen the bolt and remove the sensor.

Engine Processor Unit

22. The block is mounted next to the battery.

23. Disconnect the battery from ground. Remove the cover from the unit. Remove the unit from the bracket and disconnect the connector.

Attention! The engine processor unit is changed in a car service center, as it needs to be recoded.

Fuel pump relay

24. The relay is located in the mounting block, which is mounted in the engine compartment.

25. Remove the cover and take out the relay (purple relay housing).