Inspect Spark Plug

Disconnect the ignition coil connectors (A).

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

Fig 2: Pulling Lock Pin & Pushing Clip
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Remove the ignition coils (A).
Tightening torque :

9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

Fig 3: Removing Ignition Coils With Bolts
Courtesy of HYUNDAI MOTOR AMERICA
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 4: Inspecting Electrodes And Ceramic Insulator

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INSPECTION OF ELECTRODES 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