Valve Inspection (Except Millenia & MPV)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 Mazda Protege5, 2002 Mazda Protege, 2002 Mazda Millenia, 2002 Mazda MX-5 Miata, and 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
Remove PCV valve from valve cover. 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.