Hi guys! im having problems with my friend's corolla. The brakes on this car are crazy!  he complained about the brake pedal going all the way to the floor. I first thought that it could b air in the lines so i proceded to bleed all four tires. After bleeding them, the problem was still there! so, we bled them again and again and again! Finally i thought it could be the master cylinder or the booster. We replaced the booster with one from the junk yard and a brand new master cyl from advance auto! still the problem is there!  I checked the front calipers for leaks as well as the wheel cylinders and they are ok! no leaks at any place! 
I dnt know what to do next! it does not have abs so we can aliminate that! I did bleed the master cyl before installing it! i found another way to bleed it on the car so I will have to do that next! i also adjusted the shoes at the rear so, that's elimintaed! I checked the piston in the calipers to c if they were stuck or anything but they're not! did the same for the rear wheel cyl and they are fine! i dnt know what to check next! let me know if have any ideas as to what the problem could be! i would really apreciate it! 
1993 corolla 1.8L 
rear drums
Stock '00 
2200 cavy
sedan!!!!
 
you could have gotten a bad master cylender. the only other thing i can think of is a bad rubber line or a bad vacum line.
 
 
I! don't! know! what! to! tell! you!
 
 
Lol!!! sorry, Im too expressive!
Stock '00 
2200 cavy
sedan!!!!