So I really need some help here. I was driving my 03 Cobra into work yesterday morning and I felt like something wasn't right with the car. Half way to work - when I would give it gas at highway speed - it would bog out almost like the traction control was kicking in. As soon as I got off the exit the car died and my instrument cluster went wacko right before it went dead. I had dim dash lights and it seemed like an easy diagnoses to me battery dead = bad alternator. So I went to the store and picked up a "red top" Optima battery. I installed it at work and the car ran fine. I figured I could get the car home on the battery. Replace the alternator over the weekend. Long story short the car died again just as I pulled into the driveway. I ordered a new alternator from NAPA but it is taking a few days to arrive (special order). Here is the problem: When I started the car today it sounded like a can of marbles!! It sounds like I threw a bearing or something. Could the lack of volts be causing this to happen? Or did I mess it up driving it home on just the battery? Will the new alternator make the horrific noise go away? I am thinking the computer is messed up due to low voltage? U. M. what do you think? If any of you guys have some input I would appreciate it! If I F'd up the motor I will be pissed! And if it is bad anyone know of a reputable shop in the Pheonix, AZ area?