lean cruise plug read

For discussing B&G MS-I/MS-II set-up and tuning of fuel parameters (including idle valves, etc.).
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wildwestsydney
MegaSquirt Newbie
Posts: 18
Joined: Sat Dec 30, 2006 9:17 am

lean cruise plug read

Post by wildwestsydney »

Hi all, what would a lean cruise plug read look like? If I did a lean cruise plug chop after 4 miles how would the plug look?

Thanks

Sam
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twinturbo94
MegaSquirt Newbie
Posts: 3
Joined: Tue Nov 06, 2007 5:10 pm
Location: MI

Re: lean cruise plug read

Post by twinturbo94 »

They should be white mostly, use a flashlight to look at the base of the porciline, there should be a thin gray colored ring, the thicker and darker it is the richer you are. spark plugs with a hotter heat range will stay white farther from the tip to the base but the ring at the base is what I use to tune AFR. some fuel additives in gasoline will add tanish color
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