1997 Land Cruiser - SCOPED Cylinders and Exhaust PORTS - Lots of CARBON on two pistons - Why?

In this video I use a scope to view the inside of each cylinder / combustion chamber and piston area. I also use the scope to view the back of the exhaust valves. There was a lot of carbon buildup on two of the pistons, but I have not determined why yet. What do you think? Any thoughts on why the there is so much carbon buildup on just those two cylinders? Below are the links to the products used in this video. I provide affiliate links to help you find the products I use and as a way of supporting the channel. If you purchase a product or service with the links I provide, there is no additional charge to you. I always recommend shopping around for a better price. Thank you for supporting the channel through affiliate links. The scope I used is this one: https://amzn.to/3uyntg0 Love y'all !! See you next time !!