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I've watched the numbers jumping around a bit when idling. Never had any knocking sounds. With mine the numbers seem to remain around 1 to 3. With a nanocom you can record these parameters (and lots of others) while driving along then replay and graph them.
I did drive for quite liong distant on the weeked. On the first stop at the carpark after about 30km drive, I can hear the noise and the temp was about 89 degree which is normal (I think thats the operating temp).
After that drive another approx 20-25km and did hear the noise when idling.
Arrived home and didnt hear the noise again but I noticed that the temp was about 85 degree which is lower.
Anyone has a clue?
Is it worth buying a nanocom? What can you with it?
Old thread I know - did you ever get to the bottom of this? Someone said some maps do this - why?