Well on the way home from the show in Winston-Salem today my a/c decided to stop working about half way home. I just turned it off and turned it back on about 20 minutes later and it seemed fine. When i got home however i could hear a loud clanking noise coming from under the hood. So i popped the hood and it was coming from one of the pulleys it seemed like. The ac was off at this point so i turend it on and it got better but as soon as i would turn it off it would get loud and click and clank and the tensioner would move in and out...what could this be. Any help?