spark plug- white on one side- darker on other side - Chevelle Tech
Troubleshooting Diagnosing problems done here.

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post #1 of 4 (permalink) Old Apr 12th, 03, 10:04 PM Thread Starter
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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-
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post #2 of 4 (permalink) Old Apr 14th, 03, 4:43 AM
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that is normal for daily driving go out and do some WOT 4 1/4 mile passes should do it then look at the plugs oh remember no speeding ha ha
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post #3 of 4 (permalink) Old Apr 15th, 03, 11:27 PM
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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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post #4 of 4 (permalink) Old Apr 16th, 03, 3:51 PM Thread Starter
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