Help im getting a bad knock/misfire under wot in 3rd gear??
 

Im getting a bad knock and check engine flashes under WOT in 3rd gear. I ran a DCT scanner and said it a P0300/ Miscellaneous misfire. btw i have a JLT cai along with sct program. Iv been running the program about % month but jus started with this issue.

Sounds like possible severe detonation, I'd check it out ASAP. I returned it to the stock tune and go from there. In my mind the only way to run a tune in a car is if it was a dyno tune, even NA.