Ignition System (Engine Electrical System (G4KC - Gsl 2.4L)): Overview Kia Optima II

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 the memory of the ECM (Engine Control Module).

The engine operating conditions (speed, load, warm-up condition, etc.) are detected by the various sensors. Based on these sensor signals and the ignition timing data, signals to interrupt the primary current are sent to the ECM. The ignition coil is activated, and timing is controlled.

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1. Remove the ignition coil connector (A).
2. Remove the ignition coil (A).
3. Using a spark plug socket, remove the spark plug.
4. Install an appropriate test device.
5. Check is spark occurs while engine is being cranked. NOTE: To prevent fuel being injected from injectors while the engine is being cranked, remove the fuel pump (A) relay from the fuse box. Crank the engine for no more than 5-10 seconds.
6. Inspect all the spark plugs.
7. Using a spark plug socket, install the spark plug.
8. Install the ignition coil.
9. Reconnect the ignition coil connector.

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1. Remove the ignition coil connector (A).
2. Remove the ignition coil (A). NOTE: When removing the ignition coil connector, pull the lock pin (A) and push the clip (B).
3. Using a spark plug socket, remove the spark plug. CAUTION: Be careful that no contaminates enter through the spark plug holes.
4. Inspect the electrodes (A) and ceramic insulator (B). INSPECTION OF ELECTRODES ELECTRODES INSPECTION CHART 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: 1.0-1.1 mm (0.0394-0.0433 in.)

Scheme 8

1. Measure the primary coil resistance between terminals (+) and (-). Standard value: 0.62ohms +/- 10%