i have a whole in the throttle body with thread for some kind of screw, when i put my finger it sucks it in . and i start hearing all the air passing thru my air intake. my car has always had a shssss sound in the intake when i turned it off, i covered that whole in throttle and the shsss when away when i turn it off. do i need the whole cover , caude i can of like the shsss sound coming out of my intake when i turn it off.