Need a lot more to go on. Is the noise coming from the front, rear, middle? Does it change pitch with changes in engine speed, road speed? Does the sound change when you turn as in changing lanes left or right?
There is a tool you might be able to borrow or rent from an auto parts store that borrows them called the "Chassis Ear". It is a set of six microphones, a switch box, and headphones. You clip the microphones to suspect points, then drive around while listening with the headphones. You can move the microphones around to zero in on the source of the noise. Be aware that many mechanics have never seen or even heard of this tool. Suspension and alignment mechanics use it to find rattles, squeaks, and other noises.
Thursday, August 1st, 2013 AT 11:54 AM