Forester S F4-2.5L DOHC (1998)
Fuel Injector: Description and Operation
PURPOSE/OPERATION
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The MFI system employs a gallery type (side-feed type) fuel injector.
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The gallery type fuel injector is installed in the fuel pipe to allow cooling of the injector by the fuel.
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The features of this type of fuel injector are as follows:
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High heat resistance
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Low driving noise
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Easy to service
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Small size
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The fuel injector injects fuel according to the valve open signal received from the ECM.
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The nozzle is attached on the top of the fuel injector. The needle valve is lifted by the solenoid coil through the plunger on arrival of the valve
open signal.
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Since the injection opening, the lifted level of valve and the regulator-controlled fuel pressure are kept constant, the amount of fuel to be injected
can be controlled only by the valve open signal from the ECM.
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The fuel is injected in two directions through the holes on the plate at the end of injector.
