Quote Originally Posted by Schugg
i would say check your fluid, or flush it out. pretty easy to do yourself. the pedal goes to the floor when it looses pressure. loosen the bleed valve (by the transmission) and if you have the right equipment suck it out while pouring new in, if not fill the resivour up (make sure it always has fluid, dont let it get down to the bottom you will get air in the lines) and push the brake down and have something hold it there, i usually use a bar or stick, tighten the valve, and you will have to pull the pedal back up each time. when clean fluid comes out the other end tighten it and keep pumping the pedal to see if it gets pressure back. you will do alot of going back and forth between pedal and bleeding it, but if you have 2 people its alot faster. if that doesn't work it could be the master cylinder, i know the one for my brakes went out and as i would sit holding the break, it would start with pressure, then slowly start to go to the floor. could be similar, but i had to replace it to fix that
good write up!!!

he is right, i would try bleeding the lines first, and if that doesnt work, more than likely its your clutch master cylinder