Ugho. Ok. So it sounds like you have experienced a common problem with your 03 mach, the cylinder 8, 7,6 cooling failure. I bet your car is a early 03 production car. There is a cylinder cooling mod available for 4v engines rhag had this problem. Unfortunately, you probably have scorched the pistons and you may need a rebuild. Check the spark plugs and see if they look toast.
2003 Mach 1