Quote:
Originally posted by scr11
I've been checking the plugs recently and they all have a light brown color. None of the plugs looked too white or too black. However, I've been adjustung the timing a bit and I'm about to adjust the fuel/air mixture as I might be just a hair rich right now.
Richard - if I was running rich enough to get fuel down the piston walls, wouldn't my plugs be dark or black themselves?
Thanks!
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Scott,
You would think that your plugs would be showing a very dark color. However, if you are running a modern plug, IE platinum, etc. these plugs will not color as the normal plugs do.
There is also the issue of idle mixture and mixture at 3000.
If your idle is rich, you will not color the plugs very much. At 3000 or above you will clean the plugs and give yourself a bad read.
Very confusing, I know!!!!!!
The best thing to do is go to a shop that has a tailpipe mixture probe and read the mixture at various rpm's. (CO content)
Or go to a chassis dyno place. These folks usually know what they are doing and can dial you in correctly.
Oil should not get dirty in 700 miles.