Hello everyone, new tuner here with a lot of learning to do. I am trying to make sure I understand everything before I start tinkering with the settings. I have been looking at a lot of scans from others and I seem to see some odd things on my COMPLETLY virgin PCM. The only thing I have done is read the PCM. I have only done a few scans and I actually plan on doing a few more tomorrow. On the scan that I attached I have a few questions.

First there seems to be a lot of KR. At 7:58 it goes all the way to 4. It shows alot of other hits throughout the scan, just not as high.

Second it seems that my O2 reading do not like to stay in sync. I know they are independant but they really go hay wire when compared to each other.

Third are there any rules of thumb on comparing banks 1 and 2, for the O2,STFT and LTFT values when comparing them to each other(example STFT B1 to STFT B2)?

I have attached the files for viewing.

2008 Sierra Denali
8000 miles
I only use 93 octane
No mods (well only body and interior)
Location is South Florida - Weather reference
WB will be ordered as soon as I decide between the AFX or LC1

PS. Probably the first of many dumb questions

thanks
Jerry