when I start my car and turn the A/C on a very odd and strange noise is coming from my intake. I can't really describe the sound but it is not a tick or a knock its just some sort of odd noise. and when I turn the A/C off it dramatically quiets down. If you have any thoughts on this I would apprechate it.

 

My thought would be that the nosie is coming from the AC unit but it just sounds like its from the intake because the vibration is traveling through the engine block. Either the compressor be coming loose from its mounts or its coming a part inside.