Computer have to relearn after battery cable off?

Everytime I unplug the battrey cable for a while I get idle issues. Does the computer forget and have to relearn the engine? I have looked at the idle surge list. Really alot of came about when I replaced my sticking IAC did I just get a crap one (NON FORD Replacement)? Or is the power supply to the computer bad!?!?! I just put a MSD 6A 2 hrs ago but this problem isnt new. I also just got a code 12 on KOER.

I seen where 12 is a idle to low, and I seen what to do on here to adjust the idle. And when I disconnect my IAC my engine dies right away. So am I to asume I need to adjust that asap?

So from the Code 12 its the IAC not acting right, It sure dosnt want to idle cold. I guess im going to have to order a Ford replacement part becuase I didnt have the idle issues with the old that would stick at a high rpm. This one is a aftermarket one tired up upside down it wanted nothing to do with that.

So I have read that your engine should run with the IAC unplugged is that correct? Mine dies the second you unplug it so that mean the idle needs to be adjusted?