TwinTurbo.NET: Nissan 300ZX forum - Scorch marks on Spark Plug top normal??
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Subject Scorch marks on Spark Plug top normal??
     
Posted by LivinTheDream on September 02, 2013 at 8:48 PM
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Message So on two of my spark plugs there are scorch marks where the coil pack tip makes contact. Is this normal or ok?

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