Inspect Spark Plug

Remove the ignition coil connector (A).

Fig 1: Identifying Ignition Coil Connector
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NOTE: When removing the ignition coil connector, pull the lock pin (A) and push the clip (B).

Fig 2: Identifying Lock Pin & Clip
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Remove the ignition coil (B).
Using a spark plug socket, remove the spark plug.
CAUTION: Be careful that no contaminates enter through the spark plug holes.

Inspect the electrodes (A) and ceramic insulator (B).

Fig 3: Identifying Electrodes & Ceramic Insulator

G04803992

Courtesy of KIA MOTORS AMERICA, INC.

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

Check the electrode gap (A).
Standard :

1.0 ~ 1.1 mm (0.0394 ~ 0.0433 in) - Unleaded

0.8 ~ 0.9 mm (0.0315 ~ 0.0354 in) - Leaded

Fig 4: Checking Electrode Gap
Courtesy of KIA MOTORS AMERICA, INC.