...The first thing I would do is check the Fluid Level in the Clutch Master Cylinder, to make sure we're Not Pumping Air. And then I would get a Helper to pump and Hold the Pedal, while I Bled the Slave.
That Should help some.
Then You can go on to other Checks...if the Master is the Original, Yes! The Fluid could be Leaking Past The Piston.
Others will be here to Help Soon!
..Oh, I just re-read..the fluid is NOT Low!
Could be a broken spring in the system somewhere. Pressure Plate Fingers. Could still be AIR in the System!
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