The clutch on this system is hydraulic. You need to look at the master or slave unit as the problem. Check the clutch reservoir to see if the level is full or empty. Start with that and then if it is very low you will need to bleed it. The bleeder is located on the slave which is on the tranny. That may get you some clutch back BUT you need to determine what is causing the leak. Now it is possible that the fluid is still up there so then the master cylinder or slave have a problem with an internal leak that does not allow it to perform.