I would say air in the line, or you need a new clutch
it might be the slave cylinder
Either have air in your lines or you might need a new clutch plate.
my clutch went to the floor what happened?
It's called: Your clutch is working.
If you have to hold the clutch pedal to the floor to engage gears in a 1985 Nissan 200SX, it may indicate a problem with the clutch system. Possible issues include low hydraulic fluid levels, air in the hydraulic lines, or a worn-out clutch master/slave cylinder. Additionally, the clutch itself could be worn or damaged, leading to insufficient disengagement. It's advisable to inspect the clutch system for leaks and functionality.
Well, we need lots more information here. Is the clutch pedal actually "stuck" to the floor? In other words, can you NOT lift the pedal up to the normal position? OR, has the clutch pedal "fallen" to the floor due to no resistance from the clutch?
You have a broken clutch.
The clutch cable has proabably broken.
Sounds more like a clutch slave cylinder.
On The Floor.
You should not attempt to replace the clutch yourself unless you have considerable mechanical skills. In this case, the problem is most likely that the spring holding the clutch pedal in place is broken.