The orginal question mentioned nothing about noise or 'tone'.
This you invented to start an arguement. I have answered YOUR questions three times now and It's still "over your head".
Our BB is not a school. Myself and others give assistance/advice here as a professional courtesy only.
I suggest you attend a couple of semesters in Jr. College Auto Shop and learn how an engine functions etc.
Perhaps then, you will understand what I am saying.
