so i just started getting this weird noise from my IX. it sounds like something is vibrating against something underneath my car, it seems to be coming more the front right of the car. i can hear it in neutral most of the time, like when i first start the car and only sometimes when im driving very slow. i can hear it when i turn left really slow or going slow over bumps. i checked underneath the car to make sure the AMS tbe wasnt touching anything and there was at least a good half inch gap between the acd and the downpipe (FYI, i have the v1 AMS tbe). i dont know what else it could be. i do have Tien S Techs in the front that me and my friend put in, maybe i did it wrong and left something loose??? anyone have any opinions on what it could be? i really dont know whats going on with it but i just want some opinions from here before i take it in to get checked out.
thanks!

 

it's possible while the car is running the downpipe could move that half inch. You could try adding a washer or two to the support bar and see if it helps any - or even take it off temporarily. It's going to end up being something simple - it sucks finding problems like that.

 

I had a vibrating sound like that once. Turned out that one end of my heat shield had rusted and was vibrating against the exhaust when the car was cold or I slowed down. I just cut it off. Not sure if you still have the heat shield still on or not.

 

i figured it out! i got a little curious and went out and started wiggle my muffler and was able to recreate the exact noise, even had the wife come out and wiggle it for me while i sat in the car to make sure.

 

so what exactly was it, your down pipe?

 

the flange on my test pipe was vibrating on the small heat shield bracket, i just the 2inX3in piece off and squeezed in a fire blanket. no more noise!

 

Same exact thing happened to my IX, same solution too. =D OP has a TBE though so that couldn't have been it anyway.

 

I love when the wife wiggles it for me while I sit in the car.

 

^

 

I have this issue since changing my cat-back. I've been unable to truly figure this out. I think it's my heatshield hitting the undercarriage instead of the tbe though. The heatshield seems to have a lot of room to move around and the vibrations are just right.