My engine started making an odd sound, which I only noticed at idle and at a certain RPM(dont know what RPM yet, just know it made the sound at idle, stopped for a bit, then started again, id guess between 1500 and 2000rpm. This of course could just be coincidental)

You can hear it in the video I just took:

http://www.youtube.com/watch?v=pMOn0nlizrQ

starts about 1 or 2 seconds in then trails off around 7 or 8 seconds. help me get the ghost out of my engine! Halloween's over!

 

take your serpentine belt off... listen for noise
noise gone: check pullies
noise still there: not at the front of the engine...

you wouldnt happen to have recently put a new TB or intake on the car... have you?

 

jeez Adder, I feel like an idiot. I cant believe I didnt think to pop off the belt, even after giving that same advice to others.

I'll try that out later this week, gotta work late the next few nights and it'll be dark by the time I get home.

I have not changed the TB or intake, but if I had, what were you thinking, vacuum leak?

 

had a throwout bearing that used to make that noise