i know there are a ton of these questions posted but i havent found an answer to my specific problem. my exhaust makes a rattle/hum when i first start the car at idle and comes in and out for about two minutes. Also when i come to a stop sometimes i can hear it rattle, almost like im about to stall out, but not quite that bad. anyways, i would appreciate any input possible.

 

is it at a certain number of RPMs? it could just be the exhaust resonating and vibrating against your bumper or something. I know mine does that at about 600rpms.

 

what other mods have you done? Does the rattle emit from the rear, center or front of the car? do you expereicne the rattle through the shifter?

you'll have to be more specific.

 

It could be a loose bolt to your cat or b-pipe etc. My cat emit this nasty squeeky sound becuase I have to tighten a bolt that's holding the cat to the b-pipe.