 Carbon on #1, 2, But not #3, 4 |
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| StarBear |
 Mar 30 2026, 09:44 AM
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Advanced Member  Group: Members Posts: 2,250 Joined: 2-September 09 From: NJ Member No.: 10,753 Region Association: North East States 
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Doing my driving season prep checklist and notice a modest black carbon buildup on #1&2 plugs; #3&4 plugs looked fine. Wired brushed and cleaned electrodes.
What might be causing the carbon on just the left side? (IMG:style_emoticons/default/confused24.gif) Everything else runs fine though still a bit rich overall based on tailpipe A/F meter reading. (IMG:style_emoticons/default/driving.gif) Thanks!! |
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