Inspect Spark Plug

Disconnect the ignition coil connectors (A).

Fig 1: Ignition Coil Connectors
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Remove the ignition coils (A).

Fig 2: Ignition Coils
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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: Electrodes & Ceramic Insulator

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Inspection Of Electrodes

ELECTRODES INSPECTING 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