I have noticed my AFR have leaned out from my original targeted values at the upper RPM range. Right after flashing I was hitting my target of 10.8, but now a 5-6K miles later I am hitting 11.1-11.4 at redline. At the time of when I was road tuning I had no knock. Now with the leaner AFR I have noticed some knock between 5400-6500+ RPM.
Why is this happening?
I have attached a .CSV log file renamed to .DOC. Please rename to .CSV and view with Excel.