[noazrappy]

I was wondering will an iridium plug show color a little different then a standard?

 

[quadaholic]

I replaced my stock plug to an Iridium and I am still able to see color, be it white or black it shows what your mixture is doing just fine. I just put my big three on shortly before I added the new plug and I made adjustments according to what I saw on the plug so YES you will see the colors on that plug. hope that helps