Rattling/whirring noise in idle and deceleration on 1997 Dodge Stratus

My daughter's car has been making a rattling/whirring noise while it idles and upon quick deceleration. It has been doing it off and on, but frequency seems to be increasing.

Asked by for the 1997 Dodge Stratus
Try having the drive belt(s) removed to see if the noise goes away. If so then it is a driven componet causing this. Alt, tensioner, idler, ac compressor bearing etc. Hard to say without hearing and testing it!
1 more answer , 1 more comment
yes it could be your serpentien belt needs a bit tightening. Or it could be pully?
Thank you both for your responses. It ended up being a loose bolt in the flywheel. Thank goodness it was an easy and no-cost fix!