Kia Optima: Emission Control System / Evaporative Emission Control System
Description and operation
| Description |
Evaporative Emission Control System prevents fuel vapor stored in fuel tank from vaporizing into the atmosphere. When the fuel evaporates in the fuel tank, the vapor passes through vent hoses or tubes to canister filled with charcoal. The canister temporarily holds the vapor in the charcoal. If ECM determines to draw the gathered vapor into the combustion chambers during certain operating conditions, it will vacuum into intake manifold.
Schematic diagrams
| Schematic Diagram |
| 1. Air cleaner 2. Delivery pipe & injector 3. Engine 4. Purge control solenoid valve (PCSV) 5. Fuel tank air filter |
6. Fuel pump 7. Fuel filler neck 8. Fuel filler cap 9. Fuel tank |
Canister
Canister is filled with charcoal and absorbs evaporated vapor in fuel tank. The gathered fuel vapor in canister is drawn into the intake manifold by the ECM/PCM when appropriate conditions are set.
Purge Control Solenoid Valve (PCSV)
Purge Control Solenoid Valve (PCSV) is installed in the passage connecting canister and intake manifold. It is a duty type solenoid valve and is operated by ECM/PCM signal.
To draw the absorbed vapor into the intake manifold, the ECM/PCM will open the PCSV, otherwise the passage remains closed.
Fuel Filler Cap
A ratchet tightening device on the threaded fuel filler cap reduces the chances of incorrect installation, which would seal the fuel filler. After the gasket on the fuel filler cap and the fill neck flange contact each other, the ratchet produces a loud clicking noise indicating the seal has been set.
Positive Crankcase Ventilation (PCV) Valve
Description and operation
Operation Principle
Repair procedures
Removal
1.
Disconnect the vapor hose (A).
2.
Remove the PCV val ...
Canister
Repair procedures
Removal
1.
Disconnect the negative (-) battery cable.
2.
Remove the stabilizer bar bushing (A).
Tightening ...
Other information:
Kia Optima DL3 2019-2024 Service and Repair Manual: Brake/Clutch Fluid
Repair procedures Inspection Check the brake fluid level in the brake fluid reservoir. The level should be between “MIN” and “MAX” marks on the side of the reservoir. Use only hydraulic brake fluid conforming to DOT 4 specification. Check the brake system for any leak ...
Kia Optima DL3 2019-2024 Owner's Manual: Parking distance warningreverse precautions
The parking distance warningreverse may not sound consistently depending on the speed and shapes of the objects detected. The parking distance warningreverse may malfunction if the vehicle bumper height or sensor installation has been modified or damaged. Any non-factory installed equi ...
