Escort L4-110 1.8L DOHC (1994)
Variable Induction Control Actuator: Description and Operation
High Speed Inlet Air (HSIA) Control Solenoid
PURPOSE
The High Speed Inlet Air (HSIA) solenoid controls the vacuum applied to the Inlet Air Shutter Valve Actuator.
OPERATION
The HSIA solenoid is controlled by an output signal from the PCM. The HSIA solenoid allows vacuum to close the shutter valve at low rpm. Above
5000 rpm, the solenoid vents actuator vacuum to atmosphere, allowing the shutter valve to open.
