Fuel Injector: Description and Operation

Fuel Injector:

Eight, side-fed, dual straight-jet fuel injectors are fitted in the fuel rails.

The injector consists of a solenoid, core, needle valve and housing. When a control signal from the ECM is applied to the solenoid coil, the needle valve lifts up and fuel is injected under pressure into the intake port. The fuel sprays from the injectors are directed onto the back of the intake valves.

The injection quantity is determined by the length of time that the ECM signal is applied to the solenoid coil.


Monitoring Procedure
The drive to each injector is monitored while the engine is running. If the injector drive status is not as expected for a number of times, the injector circuit failure judgement is made. The relevant fault code is stored if the failure judgement is made on two successive trips.

The fault code will be erased if 40 warm up cycles are completed without recurrence and the MIL after 3 successive drive cycles without recurrence.