Hi, I have logged already with stock tune, the logs in my first post where logged with stock tune aswell. There is no need to clean that cylinder. It was more a scratch or so - all parts of the sparkplug are still there, but the ceramic part (outside of the engine) has scratches, but enough to have ...

Thanks for your answers. I am currently drive the stock tune as I am running in my new engine. However, I installed new NGK spark plugs with the new engine and one of them seems to have a broken ceramic part. After changing that it is much better now. I'll come back to that (and post better logs whe...

Hi, I own a '08 Mazdaspeed 3 (or Mazda 3 MPS) which had a brocken engine a few months ago. I completely built a new engine which now has run almost 1100km now. Now it's time to put some load (not 100%, but more than the last 1000km) to the engine. Doing that, moderate accelerate from about 2000 to 4...