k- gonna sound wierd but i had the same prob with my saturn and my tour did this for a while too- it sounded like it was coming from the center of the dash- when actually it was coming form the motor- only does it when you really get down on the gas? i forget what it was that causes this- something to do with the motor. Sounds like marbles- or in my case someone shaking a spray paint can really fast. I got an oil change and the tour stopped doing it- i hate the saturn and do not drive it anymore, it is leaving soon anyway
