Pedal goes to the floor?

You have air trapped in your master it sounds like to me. I had this happen once when my friend on my 3 man team doing the bleeding watched as the master cylinder went empty and the idiot had the following excuse "uh durrrr, I didn't know that it meant anything at all". after that, the brake pedal would go to the floor and I could get it to stop by pumping em.

Remove your master cylinder and use the provided plastic plugs that shoulda came with it. Be real gentle with em or they will strip right out. I did that myself, so learn from my mistake. handtight is alright here. Now, mount it up on a bench-vise and pump the center of the plunger where the pushrod would go with an adequate phillips screwdriver you don't care about (it'll get brake fluid on it and eat the paint off of it). Pump it AT MOST a 1.5" stroke until you see no more bubbles coming from the rear reservoir and see a slight disturbance in the tension of the brake fluid at the surface. Put the cap on the top and put the bail on it (the metal strap) and now mount it up in your vehicle and bleed from the furthest to closest to master cylinder