okay about a month ago i thought my alternator belt was squeeking. so i tightened it. but it still made the same noise. i even sprayed it. i have no ac belt or ps. then yesterday while driving my car started to hesitate. actually it felt like something was holding it back from accelerating. then i started smelling metal to metal burn. this lasted for about ten minutes then it stopped. it hasn't happened since, but it still makes that awful squeeking noise.can anyone give me a diagnoses?it's really bugging the F*** out of me!