I have a 1993 mazda b2600i. When I got it it ran fine. Then I needed to replace the slave cylinder, it was shredded. Sense then the truck's clutch sometimes works and sometimes drops to the floor. I've bled the line, flushed the line, cleaned the master cylinder (which was dirty and clogged), I sealed around the fluid reservoir, and pumped the clutch pedal until I couldn't walk. What haven't I done that it could be? Dynamite in hand waiting for answer.