so ive noticed i have a rattling noise coming from the engine bay compartment ive read in some of the threads that some ppl have had issues with this. at the moment im short on money but curious on what exactly this is cause ive only had this car since july 5th :9 so pretty dissapointed at the time since ive alrdy invested money into the car 3 days after purchase but here is the link let me know what u guys think and maybe tomorrow will have a better vid
http://www.youtube.com/watch?v=9fycuWh-hUo

 

That would be the pre-cats, that's the exact sound I had for 2 years before I installed headers.

 

LOL! Where's Rochester!

 

Hey, I have that noise too!

 

does it bother u? Haha cause every time I rev or turn my car off it does it

 

Funny.

OP, that's not my mystery rattle. And I know for a fact that my noise wasn't the pre-cats, because they were gutted last month. So... interpret from that what you will.

You can hear my driving-me-to-drink noise at exactly the 28 second mark here. I think I need a new tension pulley, or a new AC compressor pulley, or a new car...

 

I actually did not come along ur post so didnt hear about ur issue the ones I was reading were always the 4th gens 5th gens I only found like 2 and I don't think we have same issue because my noise is only when I rev and turn the car off

 

Also, check your heat shields. That sound is almost identical to a loose shield or two.

 

Did you Rochester feel or notice any lil increase in performance(or acceleration) after gutting those cats ?

 

Good idea.

Slightly louder and deeper. A little more high-end grunt which is noticeable and appreciated, but nothing dramatic. Yet another incremental mod.

My comments are all over the handful of recent pre-cat threads.

 

I had a similar noise. Turned out to be the heat shield on the Y-Pipe.

 

thats your heat shield have the same noise with brand new cats

 

Try using a thicker oil and see ifthe sound goes away.