Spark plug diagnosis - what are all those hard tiny white balls?

[slybunda]

There's more to this story. That doesn't appear white from running lean to me. Those look like white deposits from burning something other than gasoline. you can clearly see how much "oil" in in the threads of the plug. How much oil does that engine burn? Are you using any additives in the oil or fuel?

Also this kind of derailed the original topic and poster... To the original poster, those deposits are certainly from burning oil. +13% fuel trims are a little far away from what I would consider normal. Do the long term fuel trims change and different loads? As mentioned a vacuum leak will be found with a considerably larger correction at low load levels when compared to high load levels.


Edit: I apologize everyone, didn't realize this was so old. Mods feel free to remove if you like

engine burns very little oil. oil on threads is when i used some oil to put the plugs in so they dont sieze up.
iv run many additives over the years so could be a reaction to them or something. dont seem to be any carbon fouling unless carbon was white back in those days