KA24DE Bad idle, when coming to a stop.

[Colonel_Mustard]

@Martino

Fourth, went to my old job (Partsource) and got the battery tested and alternator…batter is fine, but the alternator is charging at 12v…good or bad?

Your car is a 12- 14.5 volt at max system, with no major drain, there is nothing wrong with 12volts.