Has anyone here got a super knock code ? I got one for cylinder # 2. Plugs were only 6 weeks old. Swapped those since it was the last thing changed when code appeared. At the same time I decided to swap coils just in case. All was fine for a couple weeks until tonight. Same code, same cylinder. A little about the car. 08 E93. 590whp, under 80k on original motor. Meticulously maintained by me. I mean not a drip of oil or anything anywhere. Fresh index 12 (when they were cheaper from fcp), I say fresh because they have maybe 2 k miles on them. Fresh plugs NGK, Coils, pi injectors (swapped from 550 to 750), threw code with the 550 and now with the 750s (so thats not the issue) Full E85, Stg 3 lpfp, pi, etc. Car has been fine even when on index 9. This just recently started. Car wont throw the code everytime, its random and has only thrown the code after 6k rpm. So, has anyone experienced this ? What was the fix ? I read plugs fixed it for a couple people but I already did that and coils so Im thinking maybe index 12 issue ??