98 civic problems please help

i really hope that someone can help me out on this on this is my first time using this web site. alright this is my sanerio i have a 98 honda civic automatic. my car was runnning good. about a week ago i noticed that when i would put it into drive or reverse the rpms would drop really low. when im drivin it and i come to a stop the rpms drop down to 0 or below that line and some times dies. if it doesnt die the rpms go up a lil and down while im stopped. i replaced the battery and spark plugs and i cant figure it out i cleaned the filter also. i hope someone can help me on this one

maybe you have a slight vacuum leak or you may need to clean out your fuel injectors for this one
jsut throw in some fuel injector cleaner in the tank and run it a lil if it still does it. it may be the vacuum leak but if not i recomend you get your car diagnosed at your local mechanic to find out wut the deal is

probably fuel injectors needs to be cleaned, could be fuel filter also. like dankster said throw some injector cleaner and see if that solves the problem