It would be easier to put in a new acc pump than to change carbs, and the pump is usually pretty inexpensive. Being that you have an automatic the carbs have a few different components attached to them. I would recommend rebuilding the one you have only if the shaft doesn't have two much play. The rebuild kit would have the acc punp in it, also. If you decide to rebuild your carb and if you have not done it before, it is not to hard, just be patient. Soak the carb parts in Berrymans for the full time alloted per thier instructions. Make a poster with numbers on it that correspond with the rebuild sheet, put parts on your poster board as you disasemble it on the proper numbers. At least that's what I do, it is to hard for me to remember where all those tiny parts belong. And most of all try to do it in a dust free enviroment and clean hands at all times