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Old 11-11-2018   #10
WARP TEN
 
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Join Date: Apr 2007
Location: Lake Bluff, IL
Posts: 2,153
Default Re: A tuning tale: BLMs say lean, plugs say rich

This may be a little out of left field, but have you tried a slightly higher heat range of plugs? Maybe your plugs are running a little cool for your most typical driving and a change might show less discoloration. --Bob
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