If this is a hydraulic clutch, check to make sure the clutch master cylinder is generating pressure. Have someone pump the clutch pedal and then hold it to the floor as you open the bleeder. You should get a steady clear stream of fluid from teh bleeder. If you get air, repeat the process untill you get clear fluid. This should make the clutch disengage by restoring normal travel to the clutch arm..
If there is air in the sytem, it is likely being drawn in past worn seals on either the clutch master or slave cylinder, or both. Look at both components for any sign of fluid seepage; if fluid can seep out, air can seep in. You may need to unbolt teh master cyl from the firewall to get a look at the area where the actuator rod enters the cylinder; this is where fluid leakage would occur.
If you are unable to get any pressure or very little pressure out of the bleeder, then the master cylinder has probably failed.
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