hecktabite

hi all I am new to this board and was looking for some help.
I hope to add some new stuff to this board as well as learn many things from it.
I drive a 88 crx dx.
ok here is the deal:
I have a d16a6 motor in my crx with a dpfi intake on it with the dx distributor I had the mpfi but could not get it to work, so i got it working with the dpfi last night i was driving it. and today it revves high but does not stay idle, and it will just stall.
I have no air filter on the car at all could thta be my problem? The car was throwing a code 15 yesterday so i changed the distributor and the car was working fine, then it just went all wack today. should i check the spark plugs? or the fuel filter or could be bad old fuel " the car has been sitting since october and i just got it started last night" or it just could be that i need an air filter cause there is nothing there :0
somone please help.