Spark plug broke in cylinder
Mine did too. At about the same time yours did. What did you find out & how did you fix the subsequent issues? I ended up nearly rebuilding my whole engine. I'm still having misfire issues. I hope to have that worked out soon. I don't understand how the computer can log misfire codes and not throw up a check engine light.
I ended up driving out the broken spark plug with a extractor and installing new spark plugs and getting some used cool packs. I also did a oil change and cleaned up the spark plug hole threads to just make sure I had a clean surface.
So not really as bad as mine then. The entire end of my spark plug broke off INSIDE my cylinder while it was running. It chewed up an exhaust valve and grooved the cylinder wall a bit. Thankfully it made it through the turbo cleanly.


