Very Strange Noise.. HELP!

[Easy Ed]

Also, had the shield on my muffler fixed under warranty with new shield and those big a$$ hose clamps. It would make a rattling sound at idle and just off idle. I found it by taking a rubber mallet and beat on the exhaust pipe making it recreate the problem. The spot welds that held the sheild on broke loose from the heating up and cooling down. Could only hope that is your problem.

Originally Posted by [__--MUD--__]

well this just jogged my memory.... There is a crappy shield between the cat and the floor pan. It can rattle making an odd noise. The fix is a big ass band clamp if I remember correctly.