Kia Optima: Repair procedures - Crankcase Emission Control 
		System - Emission Control System - Kia Optima TF 2011-2025 Service ManualKia Optima: Repair procedures

Inspection

1. After disconnecting the vapor hose from the PCV valve, remove the PCV valve. Visually check for a collapsed vapor hose or hose leaks.
2. Reconnect the PCV valve to the vapor hose.
3. Run the engine at idle, then put a finger over 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 inspect PCV operation, if operating correctly clean or replace the vapor hose.

Schematic Diagrams
Schematic Diagram ...

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

See also:

Air Flow Control (Mode Switch)
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Climate control air filter
The climate control air filter installed behind the glove box filters the dust or other pollutants that come into the vehicle from the outside through the heating and air conditioning system. If ...

If the engine stalls at a crossroad or crossing
If the engine stalls at a crossroad or crossing, set the shift lever in the N (Neutral) position and then push the vehicle to a safe place. ...

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