Air Cleaner Vacuum Motor

With engine off, check that air control valve is open to underhood air intake. If not, check valve for binding. Disconnect vacuum hose from vacuum motor and connect motor directly to vacuum source. If underhood air inlet is closed, vacuum motor is operating correctly. If not, and linkage is not binding, replace air cleaner assembly. With vacuum applied, twist or pinch off vacuum hose. If valve remains closed to underhood air, vacuum motor is operating correctly. If not, replace air cleaner assembly.