I replaced my front passenger side brake caliper as my old one was sticking and was dragging noticeably. after replacing, i had my wife help me bleed the caliper. I have bled the brakes on ALOT of vehicles over the years, so i know what i'm doing. The problem is that now after bleeding them, I have an extremely soft pedal. So soft in fact that you can push it all the way to the floor. You can pump it fast and get some pedal built up but if you sit for a few seconds, then the first push goes all the way to the floor. Later this week, i will try bleeding the other 3 wheels in hopes that fixes it. Is there any way that this could have caused the master cylinder to go bad? I am at a loss here. A month ago I replaced the drivers front caliper for dragging and I had no issues bleeding it and the pedal was nice and firm afterwards. And while the fluid did get a little low during bleeding, it didn't run dry before i added more.