PCV Valve Inspection

NOTE: Be sure to check that there is no obstruction in PCV valve or its hoses before checking IAC duty, for obstructed PCV valve or hose hampers its accurate adjustment.

Remove PCV valve referring to PCV VALVE REMOVAL AND INSTALLATION .
Connect PCV valve (1) to hose and install plug to head cover hole.
Run engine at idle.
Place your finger over end of PCV valve to check for vacuum.
If there is no vacuum, check for clogged valve. Replace as necessary.

Fig 1: Checking PCV Valve
Courtesy of SUZUKI OF AMERICA CORP.
After checking vacuum, stop engine and remove PCV valve.
Shake valve and listen for the rattle of check needle inside the valve. If valve does not the rattle, replace valve.
After checking, remove plug and install.

Fig 2: Identifying PCV Valve
Courtesy of SUZUKI OF AMERICA CORP.