Id figure id right about whats going on with my car.

So every single time i go to start it up i must give it a little gas as soon as it starts up, if i just start it up without touching the gas peddal it goes way below ideling rpm's and dies in a few seconds. It does this every time. Im not sure wat this could be. If i tap the gas just a little bit or however much i want it will be fine and it will idel fine.