First start with the 2.2 on and I can def hear it turning inside the blower. And while I'm driving. It kinda sounds like a slight grinding but I'm not sure. How do I tell if its bad or if I have a cog setup? I read they make it loud at idle/driving aswell. And I don't mean loud asin the whine under boost or air being suckd in. Its like a bad bearing sound from a pulley? Thoughts?