Forester F4-2.5L SOHC (2004)
Air Injection Control Valve: Description and Operation
AIR ASSIST INJECTOR SOLENOID VALVE
The air assist injector solenoid valve is located in the piping between the throttle body and the injector and secured to the intake manifold. This solenoid
valve is opened or closed by the signals from the ECM, adjusting the flow rate of air supplied to the injector.