Proceed to perform an engine leak down test.I have a 2011 v turned down it makes 600 to the wheels but it sat for a while. Being nice today I got on it pretty good and it started smoking out of the valve cover breather and the catch can. No check engine light, still idles and drives, just a butt load of smoke. The more I throttled it the more smoke it made. It was suggested that it might be a PCV valve but I’m just not 100% sure.
Look carefully at each spark plug as you remove them,
In preparation to perform the leak down test.