Knock after COS #3 install, but never had knock before

[CRU SS N]

Ok, I hope this works. I will try to post the file below. Thanks, Brian

[Chevy366]

Try this .tun should work now .
All I did was , copy 105kPa>paste 105kpa first column>last column>paste 105kPa >300%>linear-fill .
Just in case , right click "save as" , label what ever you want just make sure to include the extension like so "this tune .tun" , extension is in red .

[Garry]

Does this all apply to COS5, too? I'm still having trouble with low/medium throttle & load knock ...