I have a 2000 Ford Focus LX with aproximately 135,000 miles. The car started making a strange noise and I pulled over and popped the hood and it suddenly stalled. Then I drove it home about 1 mile, and popped the hood again (it was still making the noise) and I saw that the balt was not turning at all and there was a peice that looked like it was off center and that seems to be the reason that the belt is not turning what could that be?