I ran some fuel system cleaner though the mustang and it did not fix the problem. I took it to Autozone and had them write down the computer codes.
PO411 Secondary Air Injection Fault P1131 Lack of HOZs switch Lean P1131 Lack of HOZs switch Rich
O2 sensor?
I called the dealership I bought it from and the owner is going to call me to get this resolved.
Thanks to all for the help!!!