ok well i was out tonight with the new teg and i noticed a rattling noise when i was between 1000 and 2000 rpm's and thats it..... after that it sounded fine. Any ideas on what this could be? and yes it is coming from the engine.

 

a loose heat shield or something of that nature....in my car when i drive at really low rpm's i hear something by/ on my exhaust rattle.....you can check this by doing the kick test...simply kick your tail pipe(s) lightly, youll hear if something is loose

 

it doesnt sound like it is near the tailpipes..... its in the engine bay somewhere.

 

it almost sounds like there is something loose that is hitting something or is getting thrown around somewhere in the engine bay.

 

i would check the heat sheilds around the cat. it does it on my car at low rpm's too.

 

Get under the car and check the heat shield. I'm betting it's the heat shield.

 

I've also heard of timing belt tensioners doing this. I have the same problem but I think it's my heat shields, I have just to been to lazy to check.

 

bang on your catalytic convertor...and listen for rattling, check heat shield as stated above...