Matt's 95 Stang

So when ever I turn on my a/c i get this noise out the my motor. It sound like a spun bearing, but I dont get the noise if the a/c is off. The sound is coming form the middle, to left side of the motor if your sitting behind the wheel. Originaly I thought it was my idler pully (it was making alot of noise), well, replaces that and its still there. The funny thing is i really dont hear it unless im over 2000 RPMs. Any idea? Let me know if you have any questions so I can hopfully answer them. Its a 95 manuel, with 125,000 miles.

Thanks,
Matthew

Matt's 95 Stang

So bump...bump...bump

Matthew