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ENGINE AND EMISSION CONTROL – Emission Control System 17-9 POSITIVE CRANKCASE VENTILATION SYSTEM 1. Remove the ventilation hose from the PCV valve. 2. Remove the PCV valve from the rocker cover. 3. Reinstall the PCV valve at the ventilation hose. 4. Start the engine and run at idle. 5. Place a finger at the opening of the PCV valve and check NOTE 6. If vacuum is not felt, clean the PCV valve or replace it. PCV VALVE CHECK 1. Insert a thin rod into the PCV valve from the side shown 2. If the plunger does not move, there is clogging in the PCV valve |