I just replaced the rotors and pads on all four wheels and now my brake pedal goes to the floor. If you pump it once or twice it is good but then it goes back to the floor. I have bled the crap out of the lines to no avail. Someone please help i am stumped! 2006 dodge caravan 4 wheel disc. I have replaced alot of brakes and this has never happened. Thanks from the newb!!

 

Welcome to the forum. It is very possible that you flipped a seal in the master cylinder when pushing the pistons back in. Just had it happen to me a couple of weeks ago, sucks.