okay....
i drive a 95 civic ex, stock engine 157k mi

whens its cold here and my car sits for a while (overnight, through the school day, etc) ill turn it on....and the engine will rev between 1k-1.5k in neutral....it seems to be only when the car is warming up cause it ends up stoppingafter not too long

anyway...what should i check into on this
i replaced my fuel filter which didnt help

injectors? im not incredibly engine savvy so i dont know where to start....

thanx...

ill prolly post this in the civic forum as well so i get faster feedback