Inspect Spark Plug

Remove the ignition coils (A).

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

Fig 2: Removing Ignition Coil Connector
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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 And Ceramic Insulator

Courtesy of HYUNDAI MOTOR AMERICA

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