Originally Posted by Cape Cod Bob
Pull the rear brake line off the MC and plug the MC hole and just try working with the discs. This will help you isolate the problem. If the pedal still goes to the floor. ,Put the rear line back on and take off the front and plug that and see what u got. If it goes to the floor on both there is something wrong with the MC.
I have to agree with Cape Cod Bob. I had the same problem and once I isolated front from back found bad MC right out of the box.