I have a 03 touring 350z and for a couple of months now, there has been a knocking coming from under the passenger side floor. when i rev' up the car it goes away but when idoling it knocks and you can feel it under your feet. Jacked up the car and tried to see where it was coming from but as you can tell no luck.

 

Any mods?

 

03 equals high miles, check motor mounts and trans shifter bearing mount.

 

exhaust hitting trans cross memeber?

 

I don't know. There is nothing under the passengers floor. Not that I know of.

 

Yep, not much there except the CC and exhaust pipe.