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Spark Plugs – Pre-Ignition

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Usually one or a combination of several engine operating conditions are the prime causes of pre-ignition. It may originate from glowing combustion chamber deposits, hot spots in the combustion chamber due to poor control of engine heat, cross-firing (electrical induction between spark plug wires), or the plug heat range is too high for the engine or its operating conditions.

 

 preign8

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

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