I did a scan on the car when I had first rebuilt the engine. Everything checked out fine, my LTFT's were good, no knock, etc. Well I just got back into tuning it after driving it for about a month and a half and the scan is showing that my LTFT's are off and I am getting some random knock spikes. There is one part where I get 10.5* of KR and it is when Im letting off the throttle and it comes and goes in about 1/2 a second. Also I am getting 2-4* of KR when I go at about 40% throttle and it is always in 2nd gear. Any ideas what could be going on?

So could the LTFT's be causing the knock?

The tune is stock as of right now.