PCV Valve Inspection

Check the PCV valve (A), hoses (B) and connections for leaks or restrictions.
K20A2/K20Z1 engines

Fig 1: Checking PCV Valve, Hoses And Connections (K20A2/K20Z1 Engines)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

K20A3 engine

Fig 2: Checking PCV Valve, Hoses And Connections (K20A3 Engine)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
At idle, make sure there is a clicking sound from the PCV valve when the hose between the PCV valve and intake manifold is lightly pinched (A) with your fingers or pliers.
If there is no clicking sound, check the PCV valve grommet for cracks or damage. If the grommet is OK, replace the PCV valve and recheck.

Fig 3: Lightly Pinching Manifold
Courtesy of AMERICAN HONDA MOTOR CO., INC.