Well I was using my car as stage lighting tonight for my friend's grad party.

My car was idling with the lights on for about an hour.

I jumped the bands' car. The guy put the wires on backwards once, shooting a tone of sparks from his car and a few from mine.

On the way home everything was ok. Lit the tires up on my way out of the drive. Nothing bad.

Got into town, downshifted to 2nd like usual for a certain hill along the way.

Then, once I put it back in D and hit the gas, I noticed a loud squeal.

I thought it was the wheels so I slowed down. The squeal did stop once I slowed to 20-25 mph.

Then, when I gave it gas, it would squeal again.

If I was REALLY easy on the throttle, it wouldn't squeal. Put if I goosed it a little, it started squealing again.

My friend thinks it's my idler pulley. I have a really bad feeling it may be my new alternator. My thoughts, however, have no justification.

You guys have any suggestions/ideas?