38.2a Disconnect the hose from the crankcase ventilation valve...
38.2b...then unscrew the valve
2. Disconnect the hose, unscrew the valve from the cover and connect the hose (38.2a and 38.2b).
3. When the engine is idling, close the valve hole with your finger. If there is no vacuum, check if the valve or hose is clogged.
(Original version of the article on the website mitsubishiman.ru)
4. Turn off the engine. Disconnect the valve and blow through it from the threaded side. If air does not pass through the valve, replace it.