now seeing some throttle closing and more knock so being an old school engine builder that actually can read a spark plug to tune a carb back in the day I decided to pull one and check it out. Not a lick of knock going on here. The plug is very clean of any sign of it so I also used a bore scope and brought the piston down some to look at it and also no signs of knock at all. What I did find is a very high heat ring on the plug telling me it is too hot and maybe why getting this false knock. I have never heard it now not seeing it. So I did a little research ad found a colder plug so will be trying that this weekend. I was near empty today so I can get 100 octane at the pump so threw 5 gallons at it and just like I thought still got the random knock all over and still closing the throttle this is after around 25 miles of driving so it is running on all or mostly 100 octane gas now. So maybe the trigger is not knock but something else and the kr is just a way the computer is relaying it to the other sensors to pull the throttle or lower the boost. I dont know for this but on my 1992 formula when I put race gas in it the reaction is there and I can run more boost and timing and get a big power increase. So something isnt adding up to still see kr and this is on stock timing tables. So now officially stumped on it.