4. Use a twisting motion, remove the pencil coils from the spark plugs.
a - Wiring harness connector
b - Pencil coil
c - Screw
5. Remove the spark plugs. Replace the spark plug if the electrode is worn;
the insulator is rough, cracked, broken, or blistered; or if the precious
metal is not visible on the spark plug electrode.
IMPORTANT: The color of the plug may not accurately reflect its condition. To
accurately diagnose a faulty plug, inspect the precious metal on the plug's
electrode. If no precious metal is visible, replace the plug.
a - Precious metal
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