[Tishabet]

So my brakes rather suddenly went downhill last week, all of a sudden I could put the pedal on the floor! If I pumped them up I could brake, but it took two or three pumps before I got some real stopping power, and this made driving the car an unsafe thing to do. So I figured that maybe I had a bad master cylinder. So I bought a new one, and installed it this afternoon and bled the system.....absolutely no improvement, symptoms are the same, I can put the brake pedal on the floor with very little reistance and almost no braking power, but the brakes firm up if I pump them. What on earth is happening here? Could this somehow be the booster? the brakes are very solid when the engine isn't running, but when I put pressure on the pedal and then start the engine, the pedal travels to the floor as soon as the engine catches. I know just about nothing when it comes to power brakes, but I've rebuilt entire brake systems on antique cars, and so maybe my suspicion of the booster is just based on the fact that I don't really know how it works. Anyway, I really want to get my 944 back on the road, and need some advice on what I should be looking at to fix this problem. Any and all advice appreciated, thanks all!