I just replaced my brakes as well and I had the same problem. I had to drain the whole brake system since I switched to synthetic brake fluid. I removed both calipers to drain them, the master cylinder, and the brake lines. I then reattached everything and added the synthetic (DOT 4) brake fluid. Pumped untill I was about to pass out, took a brake because I was stumped. How could I have messed up this simple brake job. Knowing that it was a simple system and being so stubborn I just kept on pumping and long and behold I had brakes again. Dont give up just keep on pumping my friend. You too will get there eventually! Best of luck!
Danny
