Remove the harness holder (A).

Check the PCV valve (A), the hoses (B), the pipe (C), and the connections for leaks or restrictions.

At idle, make sure there is a clicking sound from the PCV valve when the hose between the PCV valve and the intake manifold is lightly pinched (A) with your fingers or pliers.
If there is no clicking sound, check the PCV valve washer for cracks or damage. If the washer is OK, replace the PCV valve and recheck.

VIN, Engine, (Motor), Transmission Numbers, and Paint Codes
Vehicle Identification Number
a.
Manufacturer, Make, and Type of Vehicle
JHM:
Honda Motor Co., Ltd.
Honda passe ...
Connecting Rod and Crankshaft End Play Inspection
Remove the oil pump.
Measure the connecting rod end play with a feeler gauge (A) between the
connecting rod (B) and the crankshaft (C).
Connecting Rod End Play
...
Fuel and Emissions System Description - Electronic Control System
Electronic Control Systems
The functions of the fuel and emission control systems are managed by the
engine control module (ECM) on vehicles with manual transmissions or the
powertrain cont ...