MEFI Fuel Injection
Fuel Injector
03-04 wiring sample Click to view wiring
Fuel injectors are electric solenoids. They are spring loaded closed and opened electrically. They are supplied voltage from the Ignition relay and are grounded by the ECM. There are only 2 fuel injector drivers for the MPI engines. Four injectors are fired by each driver. All four on each driver are fired at the same time. The amount of time (in milliseconds) that the injector is grounded is the amount of time the injector is open. This is the injector’s pulsewidth.
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