does anyone know what

[Unregistered]

might be wrong. i was driving with the ac on and at about 3k rpm the car had no power for a few seconds. it did this two or three times. thanks

[632 Regal]

could be winter fuel boiling in the fuel rail, been there done that. Go get some fresh fuel from a really busy station, near a freeway exit or something and see if the problem goes away.