Fill the master cylinder full, leave the cap off. Open one of the bleeders on a caliper (the furthest away from the master), and go have a cup of coffee. Come back and see if it is dripping out of th eopen wheel cylinder. If it is, close it and move on to the next wheel cylinder. Keep checking that the master does not go dry. Once all wheel cylinders have been wet, go around and do it again, but watch as you do it. After that, do a regular bleed with someone on the brakes. It will pump up in no time.