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Spark plug color/sondition question

   
Old Feb 15, 2005 | 12:06 AM
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Slow89Iroc-Z
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Joined: Jan 2002
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From: Oswego, IL
Car: 1989 Iroc-Z
Engine: 350ci SBC
Transmission: 700R4
Spark plug color/sondition question
The #1 plug ceramic on the tip is black and the ground electrode it white/gray. This plug has about 15miles on it. It is different from the rest. What does it mean? Engine feels like it has a miss at idle..
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