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Any idea what would cause this type of scoring on a spark plug?

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Old 09-23-2004, 08:20 PM
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Default Any idea what would cause this type of scoring on a spark plug?
I replaced one of my ignition coils today as it wouldn't stay put in its hole. I also replaced the spark plug as it was fouled. I discovered the following on the spark plug. Any idea what would cause that type of scoring? Arcing from the coil to the plug?

<img src="http://1.8t.org/~kjgarreau/badcp/DSCF0021.JPG">
<img src="http://1.8t.org/~kjgarreau/badcp/DSCF0019.JPG">
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Old 09-23-2004, 08:21 PM
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have you looked in the barrel of the coil pack?
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Old 09-24-2004, 05:28 AM
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Default yeah, I didn't see anything amiss.
water under the bridge now though I suppose... put a new pack and plug in cyl 3. Need to replace all the other plugs.
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Old 09-24-2004, 08:37 AM
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have you seen your dremel lately?
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Old 09-24-2004, 12:53 PM
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Clearly melted has to be an ARC of some type. Dont they sell the plug boots seperate?
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Old 09-24-2004, 01:06 PM
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Default Yes and they are relatively inexpense. The boots do tend toward carbon tracking and pinholing. Typ-
ically that leads to arcing to the head and misfires but ....
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Old 09-24-2004, 09:44 PM
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I didn't pay a visit to the plug with the dremel ;-P
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Old 09-26-2004, 07:14 PM
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Holy rusted CP, Batman
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Old 09-29-2004, 06:27 PM
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Eh?
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