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Hyundai Equus: Repair procedures - Crankcase Emission Control System - Emission Control System - Hyundai Equus VI 2009-2021 Service ManualHyundai Equus: Repair procedures

Inspection
1.
After disconnecting the vapor hose from the PCV valve, remove the PCV valve.
2.
Reconnect the PCV valve to the vapor hose.
3.
Run the engine at idle, and put a finger on the open end of the PCV valve and make sure that intake manifold vacuum can be felt.
   
The plunger inside the PCV valve will move back and forth at vacuum.

4.
If the vacuum is not felt, clean or replace the vapor hose.
    Schematic Diagrams
    Schematic Diagram ...

    Positive Crankcase Ventilation (PCV) Valve Description and Operation
    Operation Principle ...

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