I lost pressure n my clutch. I have changed the master cylinder and slave and bled the system. You can drive for a short while then the clutch will go completely down. I have to unstick it to get the pressure again.

 

My car is a Honda Accord eX 1995 model

 

it sounds like the pressure plate is giving out


when was the clutch assembly changed last ? how many miles now ? how many miles when it was last changed ?

 

When the pressure goes away, have one other person either press the clutch pedal or observe the slave cylinder. If it is working then as Manny stated there may be a problem inside the clutch.