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EGR Control Solenoid: Description and Operation
PURPOSE/OPERATION The EGR solenoid regulates the amount of vacuum supplied to the
EGR valve. The EGR solenoid is a duty-cycle type
solenoid. It has a valve that opens and closes the vacuum source line to atmosphere many times per second. This allows only a certain amount of ported vacuum to be applied to the EGR valve, thereby controlling the amount of
EGR operation.