Before I changed my knock sensors I was getting the same thing a lot just takin off would give me 15* KR. Then before I actually removed the sensors I plugged the new ones in and wrapped them in old Mylar bubble wrap from an old window shield and still got the KR but after replacing both front and rear it went away. I do get about 4.8* at about 2500 at WOT on a stock car but it's normal from what I understand. I don't get any knock during cruise unless it's like .8 or so when the convertor unlocks or locks but it's quick. I'm thinking that the PCM remembers what the sensor did while it was connected. Why else would it show KR with it disconnected? I know the PCM has the ability to tell if the sensor is there, but having mine disconnected didn't set a code.
Jeff
