Nissan Repair: 300zx clutch pressure, clutch action, clutch master

Question
my clutch is losing pressure and barely catches off the floor
i replaced the clutch and master and slave cylinder
what would cause it to lose pressure?

Answer
Brad,

If you have replaced both the master and slave cylinder and you have lost clutch action (Feel) then the clutch is the only thing left.  Well, the clutch release fork could be bent.  But, the most common thing is the clutch's pressure plate springs going or the clutch itself is worn.  Now, the clutch master and slave have been bled properly...  If pressure cannot be built up would make ti feel this way.