First of all, tahnk you in advance for any help that you can give me. About two months ago, my 99 v6 mustang would start but the speedometer would race to 120 mph and my rpm would go to 7, but the engine didnt race. It would do this once a week. Well, last week, it started doing that once a day - only in the morning when I would ge tup and go to work. Yesterday, it wouldnt start at all. It would sound like it wanted to start (clicking noise), but it wouldn't start. The headlights come on and the radio comes on, so I dont think its the battery. Could it be the starter or the alternator? If so, how easy is it to change the starter and the alternator?