I had a rattling sound that happened right off idle on acceloration from a dead stop. I was told by so many people that it was a loose heat shield or blown cat... well after looking at where the sound was coming from, and studying the crap for a a while, turned out that the rattling sound came form the serp belt tensioner moving since it was old and worn and couldn't keep proper tension. Well... 95 bucks + shipping later and my car feels much happier and quieter with the new Vovlo OE tensioner assembly. Now I just need to replace that idler bearing and find out what is making the chirping sound and I will be all happy again :)

Kevin