I am having the same problem this afternoon. i started the car to warm it up before taking off and the clutch pedal started sticking to the floor so after a few pumps it became stiffer, but when i put it in 1st gear and barely even released it by a half an inch and the car jumped and stalled out. when i got out to see if it was leaking there was a steady drip on the pavement. now the pressure came back and it isnt leaking as much. I dont know what the problem could be because i checked the reservoir and the level barely went down at all and it isnt cracked or leaking from there. i cant find a leak on any of the lines but maybe im not looking hard enough