That's a lot on a 7747. Not sure but think it's quite different then a P4? Remember your only getting data every 1.2 seconds so this is an accumulation of what has happened. Then it stays at that number for all cells until it increases again.

To even find correct location in data log it takes watching the data one frame at a time while watching history table, then match it up to spark table and take some out.

If it's happening at WOT? Do the Highway Lean Cruise and ESC done patch, can then turn off HLC by rasing temp to max. This turns off the forced knock test at WOT...