can you be more specific about the quality of the noise it makes? Maybe even make a recording if you can, one from inside the car (if the noise is audible), and one from outside the car. It would help others to make a guess at what might be going on.
good luck!
__________________
'02 Subaru WRX (Bugeye O.O)
'97 Nissan Altima GXE
|