Kia Optima: Repair 
		procedures - Ignition System - Engine Electrical System - Kia Optima TF 2011-2020 Service ManualKia Optima: Repair procedures

On-vehicle Inspection

Spark Test
1. Disconnect the ignition coil connectors (A).

2. Remove the ignition coils (A).

3. Using a spark plug socket, remove the spark plug.
4. Install the spark plug to the ignition coil.
5. Ground the spark plug to the engine.

6. Check if spark occurs while engine is being cranked.
To prevent fuel being injected from injectors while the engine is being cranked, disconnect the injector connector.

Crank the engine for no more than 5 ~ 10 seconds.

7. Inspect all the spark plugs.
8. Using a spark plug socket, install the spark plug.
9. Install the ignition coil.
10. Reconnect the ignition coil connector.

Inspect Spark Plug

Inspect Spark Plug
1. Disconnect the ignition coil connectors (A).

2. Remove the ignition coils (A).

3. Using a spark plug socket, remove the spark plug.
Be careful that no contaminates enter through the spark plug holes.
4. Inspect the electrodes (A) and ceramic insulator (B).

Inspection Of Electrodes

Inspection Of Electrodes
Condition
Dark deposits
White deposits
Description
- Fuel mixture too rich
- Low air intake
- Fuel mixture too lean
- Advanced ignition timing
- Insufficient plug tightening torque

5. Check the electrode gap (A).

Standard

Unleaded : 0.7 ~0.8 mm (0.0276 ~ 0.0315 in.)


Inspect Ignition Coil
1. Measure the primary coil resistance between terminals (+) and (-).


Standard value: 0.62Ω ± 10%

Description and Operation
Description Ignition timing is controlled by the electronic control ignition timing system. The standard reference ignition timing data for the engine operating conditions are preprogrammed in ...

Removal and Installation
1. Disconnect the ignition coil connectors (A). 2. Remove the ignition coils (A). Tightening torque :3.9 ~ 5.9N.m (0.4 ~ 0.6kgf.m, 2. ...

See also:

Components and Components Location
Components Location 1. Engine Control Module (ECM) 2. Manifold Absolute Pressure Sensor (MAPS) #1 3. Intake Air Temperature Sensor (IATS) 4. Manifold Absolute Pressure Sensor ...

Operating Precautions for Catalytic Converters
WARNING - Fire A hot exhaust system can ignite flamable items under your vehicle. Do not park the vehicle over or near flamable objects, such as dry grass, paper, leaves, etc. Your vehicle is ...

Satellite radio reception
Satellite radio reception You may experience difficulties in receiving SIRIUS® satellite radio signals in the following situations. If you are driving in a tunnel or a covered parking area. ...

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