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Old 10-24-2003, 08:22 PM   #1
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Default Sparkplug question

I pulled one of my spark plugs today, it has about 1000 miles on it its a AC delco plug anyways, the electrode and the part it sparks off of is a very solid light brown all over then in some spots its dark brown...does this mean anything or is this just normal?
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Old 10-24-2003, 08:52 PM   #2
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Light tan deposits are normal. That'* what you want to see.
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Old 10-24-2003, 09:31 PM   #3
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Spark residue? I would think thats a good thing to have on a spark plug. That Delco plug is doing its job nicely
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