Well, I think the '96 might have a */C problem. Sometimes when stepping on it off the line I hear this weird almost buzzing/grinding noise from the right side of the car. It doesn't happen all the time...but sometimes it does. I also think my boost is low. It stops about a tad before the 3/4 mark and quivers sometimes.

No service engine lights or anything else to indicate something is wrong. Please tell me this isn't something costly.

Check for the obvious first. Worn slipping belt. Defective belt tensioner. Worn coupler.

Sounds like an idler or tensioner pulley. Oil one at a time until the problem goes away.

SC probs are most apparent at idle.

I went back out and there does appear to be a quiet rattle. I listened to the engine for 10 minutes at the dealer and it didn't make a bad noise.

Heres a video...don't know if you can pick the sound out at all.

http://members.shaw.ca/bonneville01/MVI_0011.avi

All I know is that whent the HB when on the '89, it was turning heads on the street. It was LOUD. This is not.

The belt looks ok, but it is snowing so I will oil them when it stops. Could a coupler make that buzzing/grinding sound as well? And is my boost reading normal, or is it kind of low? I can't get it past 3/4...

Normaly the boost gauge should go a little before the yellow part.

May be a boost control solenoid going bad? ...very cheap to change if this is the BCS.