Land Rover Workshop Service and Repair Manuals

 
The fuel injectors are operated directly by the ECM for fuel metering (start of injection and quantity of fuel injected). 
 
The operating components of the piezo fuel injectors are: 
 

The piezo actuator  
The injector body containing the hydraulic servo system  
The fuel injector nozzle  

NOTE :  

 
NOTE :  

 
NOTE :  

Fuel Injector Not Actuated (Not Injecting Fuel) 

2

 -

HP connection

3

 -

Control piston

4

 -

Nozzle needle

5

 -

Nozzle HP chamber

6

 -

Nozzle spray holes

7

 -

Valve mushroom

8

 -

Fuel return

9

 -

Valve piston

10

 -

Piezo actuator

New injectors can be installed in any cylinder and DO NOT have to be configured. 

Each Injection event is controlled by a charge and discharge cycle allowing energy to dissipate in, and recover 
from, the injector. Never disconnect the wiring connector when the vehicle is running. The injector may remain 
open thus causing engine damage. 

For safety reasons, the engine must be at standstill for 30 seconds before starting work on the HP fuel systems.