The clutch on the f-150 my b/f and I have, will go to the floor and need pumped up to gain pressure, or fluid added, and then we can ussally start driving it, .. today he went out to use it, and the clutch went to the floor without pressure again, he added fluid, tried to pump it 20 times, and it still didnt work... any suggestions??.. i dont know where you bleed it from, or where to check, ?..

ok, .. we put brake fluid in it when we got home, as when he had filled it in the morning it was too dark to see how much it needed, we pumped it some, didnt work, then filled more, and the clutch came back.. but there was a puddle under the truck.. when we were pumping the clutch nothing came out, so we dont know what is leaking, or when?...

It's either your master or your slave. You should be able to see where the leak is coming from. You bleed it at the slave. Check you lines too.

you need to replace the slave cylinder my 95 did the same thing

the seals are worn out in the slave cylinder and the fluid is running out .if you have trouble pumping enough pressure to bleed the new slave the the clutch master cylinder needs replaced too.