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Spark Plugs – Detonation

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This form of abnormal combustion has fractured the insulator core nose of the plug. The explosion that occurs in this situation apples extreme pressures on internal engine components. Prime causes include ignition time advanced too far, lean air/fuel mixtures, and insufficient octane rating of the gasoline.

 detona9

More information On Basic Car Maintenance CD Rom
Information supplied by Champion Sparkplugs ©2009

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