S2000 L4-2.2L (2004)
Spark Plug: Testing and Inspection
Spark Plug Inspection
1. Inspect the electrodes and ceramic insulator.
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Burned or worn electrodes may be caused by:
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Advanced ignition timing
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Loose spark plug
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Plug heat range too hot
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Insufficient cooling
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Fouled plug may be caused by:
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Retarded ignition timing
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Oil in combustion chamber
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Incorrect spark plug gap
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Plug heat range too cold
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Excessive idling/low speed running
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Clogged air cleaner element
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Deteriorated ignition coils
2. Do not adjust the gap of platinum tip plugs (A); replace the spark plug if the gap is out of specification.