Valve Inspection - Mazda6 (3.0L) & MPV
WARNING: This page is about a different car, the 2003 Mazda Protege5, 2003 Mazda Protege, 2003 Mazda MX-5 Miata, 2003 Mazda MPV, and 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
Remove intake manifold (MPV only). Remove PCV valve. See Figure or Figure
. 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 airflow is not as specified, replace PCV valve.
Courtesy of MAZDA MOTORS CORP.