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Old 02-20-2008, 03:56 PM
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bobs bobs is offline
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Join Date: May 2007
Location: Richmond, VA
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Quote:
Originally Posted by johnathan1 View Post
edit: I should also add that I was looking at the old plugs I pulled out of the motor earlier, and they look like they have a hard grey coating on them that I can chip off with my fingernail...only on one side of the electrode...the other side is much cleaner...they are all like this. I'm guessing this is carbon fouling?
Doesn't sound like it to me. Could it be oil fouling because of valve stem seals? Look at these links and tell us which picture is closest to your plugs:

http://www.dansmc.com/Spark_Plugs/Spark_Plugs_catalog.html

http://www.centuryperformance.com/spark2.asp
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'97 S320 (LWB), Ruby Red Metallic, 73k miles
'97 S420V, Smoke Silver Metallic, 155k miles

Last edited by bobs; 02-21-2008 at 03:40 AM.
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