The ECM sends control pulses to the fuel injector solenoid.
Fuel enters the top of the injector, through the valve ball or needle, and a recess in the guide plate at the injector outlet.
The guide plate contains 6 holes that control the flow of fuel, forming a conical spray of fuel towards the intake valve. The atomized fuel vaporizes before entering the combustion chamber.
Withdrawal
Attention: the fuel system is under pressure. To reduce the risk of injury or fire, relieve fuel system pressure before disconnecting fuel lines.
1. Release fuel pressure.
2. Disable «-» battery cable.
3. Remove the fuel injector harness connectors.
4. Remove the EGR valve.
5. Remove the fuel supply line.
6. Remove the fuel manifold mounting bolts.
Before removal, the fuel manifold should be cleaned with an aerosol, in accordance with the attached instructions.
Do not immerse the collector in liquid cleaning solution. Be careful when removing manifold to avoid damage to connectors and nozzle spray heads.
Prevent contamination from entering open pipes and passages.
The fittings must be capped and the holes sealed with plugs during maintenance.
7. Remove the fuel manifold with the injectors installed on it.
8. Remove fastening collars of a fuel injector.
9. Remove the fuel injectors by pushing them down.
10. Remove the O-rings from the injectors.
Installation
Attention: Injectors are marked by capacity. When ordering a fuel injector, make sure you order the part stamped with the same part number as the one on the old injector.
1. Install new O-rings on the fuel injectors after lubricating them with engine oil.
2. Install the fuel injectors on the fuel rail sockets with the injector terminals facing out.
3. Install the injector clamps on the injectors and the edge of the fuel manifold.
4. Make sure the clamp is installed parallel to the fuel injector harness connector.
5. Install the fuel manifold assembly on the cylinder head and tighten the fuel manifold mounting bolts to 25 Nm.
7. Connect the fuel supply hose.
8. Connect the fuel injector harness connectors. Rotate each of the fuel injectors to avoid stretching the wiring harness.
9. Install the EGR valve, if fitted to the vehicle.
10. Connect «-» battery cable.
11. Perform a leak test on the fuel manifold and fuel injectors.