EGR Shut-Off Solenoid

The EGR shut-off solenoid is an electrically-operated vacuum valve located between manifold vacuum source and EGR valve. A controlled vacuum bleed is located between solenoid and EGR valve. This vacuum bleed is a backpressure variable transducer. These 2 devices operate EGR valve for optimum performance. Solenoid switched vacuum is also supplied to canister purge valve.