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spark plug- white on one side- darker on other side

9K views 3 replies 3 participants last post by  RAMBO 
#1 ·
I put in new spark plugs about 2 weeks ago- Pulled one out yesterday to see how they are doing- look ok- White on one side- but the other side is darker- not oily dark- just darker...

Is that normal? I think my engine is running lean- it used to leave big black carbon spots under the exhaust- but since then i had the tail pipes cut off and new headers installed- and it doesn't leave carbon at all anymore- i think removing the tails leaned it out...

Anyway- thanks for any info-
Ben
 
#3 ·
Your ok.

Most likely the side nearest the Exhaust is getting a "second dose of cooking" when the combusted gas exits the chamber.

Be grateful your where you are. For a while, my plugs came out Rich as hell. So rich that I could hold them up right, light them, and use them as a candle.

 
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