I have been having this issue almost everytime I get into the car after not driving it a few days and get in it. I push down the clutch and it goes all the way down. Like it lost pressure. But if you get it out on the road and drive if about 5 minutes everything is fine and will be all day as long as you are consistently driving it. But if it sits a day or so it reverts to this way. But all the time. I think it might be the master cylinder. Not sure.. Wanted to see if any had this issue?