Water is coming out of car as fast as I put it in. What could be the problem

Where does it come out from? The radiator itself at a seam or at the bottom? Or through the reservoir? You'll have to have this looked at professionally. If you have an internal engine issue, for example, exhaust gases could be forcing back-pressure in your cooling system allowing coolant to overflow back out. It's really hard to say -- it has to be looked at.