Recently installed a full Stoptech pads and slotted / drilled rotors set on my 2010 G37 6MT. Except for getting the rear rotors off went fairly normal. Bleed the brakes then went for a brake seating ride using Stoptech recommendations. Pedal was a bit soft but came up with a pump. So I bleed them again this time disconnecting the ABS per someone's recommendation. During the bleed with my wife pumping the pedal the pedal went to the floor. Looked like the reservoir had fluid but filled anyway. Picked up a Motive self bleeder kit and bleed again. Got some pedal back but now had to pump a couple of times and if pressure left on the pedal it would go almost to the floor. After a lot of research it sounded like the master cylinder seals might have gotten damaged when the pedal went to the floor during the bleed process. So I changed out the master cylinder and yes I bench bleed the new unit. Now if have brakes that are almost useless. Have about half pedal and they won't pump up much.
Help! Anybody have any suggestions? Any ideas?