noise from dash ??

What is the popping noise from the dash-sounds like it is coming from behind the a/c vents and/or radio ? This may sound strange to you, but to me it acts as though there is a weight on a pendelum that hits when the cars motion swings the pendelum to one side.
It also seems to lessen after the car has been driven for a few miles.
It is definately coming from behind the radio area in the dash.
Anybody?
Last edited by mikejpss; May 15, 2008 at 11:23 AM. Reason: spell correct


