I have change some part on my 89 cruiser. Fj80 Booster fj62 M/C and all stock calipers and drums. I had the master cylinder leaking into the brake booster so I ordered new parts to do the work. I've bench bled the master cylinder and bled all the wheels and proportioning valve starting from the passenger rear and working my way up. If you pump the brake pedal with the car off it becomes hard. If the car is running. The brake pedal has continuous pressure but falls all the way to the floor. What other steps could I do to correct this problem of bled the whole vehicle twice and bench bled the master twice and I am lost for what's next. Thank you for your help.