Hi, just bought a 97 Acura CL 2.2l and when I drive at speeds above 30 mph I hear this humming sound that increases the faster I drive. Checked the fender liners and they are in place with no rubbing from the wheels. I was wondering if it is the resonator box somehow loose in the bumper sucking air thus the sound getting louder under acceleration. Does or did anyone else have this problem and if so help me get rid of it. thanks

 

It could be a loose resonator box. Or, it could be your tires. How's your tread, or have you recently changed tires? Have you made any modifications to the car lately, or at all?