if i unplug my car battery will all my afc setting need to be re programmed or will it stay the same

 

All your settings will be stored, don't worry.

They will only be erased if it is actually removed from the wiring of the ECU. I don't mean the little plug in the harness half way. That you can remove to hide your AFC when you leave your car unattended. I mean, you lose your settings if you remove the tapped wires to the ECU.