Re: Good, rich, lean and very lean spark plugs

Posted by rij1 on
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Good-rich-lean-and-very-lean-spark-plugs-tp4046175p4046180.html

I thought the #1 was good too its more of a light grey, The #2 had a good heat mark on the ground strap that went from the tip to the bend so I figured the timing was good. Cant see in the pic though. But i'm not sure. The #3 porcelain and ground strap is more tan then white, The #4 Is white as snow both on the electrode, porcelain, Ground Strap and the base above the threads.

I haven't noticed any pinging maybe rattling. I'm not sure

The weird thing about this is I don't remember any difference in the plugs from when I did a compression check about a month ago. Maybe I wasn't paying attention at the time.
The only thing I have done since then is go from 91 octane back to 87 and used seafoam in a tank of gas once.