Valve Inspection (MPV)

Remove intake manifold. Remove PCV valve from center of engine. Blow air into port "A". See Fig 1 . Air should flow from port "B". Blow air into port "B". Air should not flow from port "A". If air does not flow as specified, replace PCV valve.

Fig 1: Identifying PCV Valve (MPV)

Courtesy of MAZDA MOTORS CORP.