I was wondering if anyone could tell me what is causing a noise. The noise sounds like metal vibrating or rattling against other metal. or maybe some rocks on a cookie sheet. It makes the noise when I accelerate fast and my RPMS shoot up. It does it most often when accelerating up a hill. It sounds like it is around my front driver side around the tire or under the hood. I cant pin point it very well. Thanks for anyone with suggestions/answers.