Whistling/ Kettle Noise

[Armin Dastjerdi]

So I picked up a mustang a week ago and on the test drive it wasn't making any noise. The car drove fine and I didn't notice any problems. Starting today however, the car has been making a very high pitched whistling noise and I can't even figure out if it is coming from the back or the front. I included a video for you to check out. At the very end it almost sounds like its about to explode and is really loud. I am really worried so if you can help that'd be great.

View: https://www.youtube.com/watch?v=L-9VSIg4UEc

 

[Pearl02]

Hard to figure out dude. I've had a idle air control motor hum or whistle when it was going bad. Didn't really sound like it to me but check it out. Has to be coming from the engine somewhere. Vacuum lines or something. Good luck man..

 

[Az Pete]

My a/c system whistles when the compressor is engaged.