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Spark Plugs – Overheated

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A clean, white insulator firing tip and/or excessive electrode erosion indicates this spark plug condition. k This is often caused by overadvanced ignition, timing, poor engine cooling system efficiency (scale, stoppages, low level), a very lean air/fuel mixture, or a leaking intake manifold. When these conditions prevail, even a plug of the correct heat range will overheat.

 

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

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