No noise on mine, don't think it's the AFM. Sounds like somethings lose somewere. Check the exhuast too.
2010 Black SS Auto
Vector Motor Sports Tune - ECM No AFM/Trans Stage I
Stainless Power LT/Hi Flow Cats/Tru X-Pipe/40 Series
-Magnuson MP2300 TVS Supercharger (Aug 22 2014)