I don't think it is a belt issue. All belts seem tight. It only happens when accelerating and it has become worse over the past week. At first I thought a simple hose leak but now it is loud! When I accelerate, everyone stares at the noise and it is not a "pretty" whistling noise but more of a loud high pitch squeal. I think maybe turbo bearings but I was hoping someone else had similar issues. It only has 32,000 miles. My first Ford and I am a little taken back if the turbo has already gone bad.