While working on the alternator, did you disconnect the battery terminals?
Did you try feathering the throttle to keep the engine running?
When battery terminals are disconnected, the engine computer loses its memory and if the idle control system is dirty, the idle would be excessively low and would result in engine stalling. It might take some running of engine for the computer to relearn and stabilises the idling speed.
Try cleaning the throttle body and retest. If the Malfunction Indicator Light is showing, scan for trouble codes and let us know the exact code.
Wednesday, January 2nd, 2013 AT 11:39 PM