I don't know if this will help, but I had a Fiero a few years ago that the clutch quit working in. I replaced the slave cyl - still didn't work. So I replaced the master cyl - still didn't work. I must have bled a quart of brake fluid through that system and could not detect any air in it... Finally, after many hours of frustration, I was just standing there staring at the slave cylinder and it struck me that it just didn't look straight. I put a small level across the top of it and, sure enough, the bleeder end was about a sixteenth of an inch lower that the other end. I Jacked up the car on that side, bled the cylinder again and got a bunch of air out of it. The clutch worked perfectly after that. My point is, make sure that the bleeder on the slave cyl is the highest point on it when you're bleeding it. Good luck.