Check the hydraulics, you may have a leak at the master or slave cylinder and air has entered the system, you will have to repair the leak and re bleed the system.
March, 7, 2008 AT 8:10 PM
Check that the clutch res. Is full and there is no air in the system. You can have some one pump the clutch pedal once, twice and hold the pedal to the floor on the third pump. While holding to the floor gently open the bleeder screw on the slave cylinder.
You will hear and see if there is air in the system. If there is no air you may also be able to take up the slack in the pedal. Lengthen the rod at the top of the clutch pedal that goes through the firewall into the back of the clutch master cylinder. I believe it takes a 12mm wrench.