Same Here
I have been having the same
problem, twice now ive had no brakes at all and when im driving around sometimes the pedal is normal but sometimes it goes to the flor before i get anything, then when i pump it its all normal for a bit.
I checked all the pipes underneath and it looks okay, only thing i did find was when i checked the master cylinder i found oil on it and discovered a hole in the turbo pipe. I havent checked the vacume pipe though, where is it?