My car eventually needed the new alternator. I have come to the conclusion that the rotor where the brushes come in contact, has become slightly out of shape, making the brushes bounce on and off the contacts as the rev's get high enough. I would recommend getting yourself a motorcraft alternator from ford. I found one for a total of $160, after the core charge. From what I have heard, a new alternator for this car will run you over $300, but if you can find a new one, then go for it... -Nick
