so went and pulled out that plug it started right up and idled fine ran it for a few minutes than pulled the valve cover and everything looked perfect a little sludge but nothing to worry about no play in anything went and drained the oil no shavings and everything looked fine so im just confused im gonna flush it and put some new oil in it but also that new plug I just put in it looks like its still running pretty rich what could be the cause?

 

O2 sensor could cause an overrich condition, could be other things as well, injector issues, I'm sure you'll get some great responses from everyone here.