Originally Posted by crwarren11

Thanks for your response. I replaced the master cylinder, and there is no improvement.
Everyone keeps telling me it's air in the system. I have bled each caliper at least 6 times each by various methods...power bleeder, old school friend on the pedal, etc. No improvement, no air coming out. Vacuum checked last night at 27mmHg. As soon as I turn of the car the vacuum pretty rapidly dissipates. I'm not sure if this is normal or not. I was under the impression that the booster should hold vacuum for a while after the car is off - 2 or 3 pumps, and then the brake pedal should be very hard. It is still soft. Booster or air are the only possible things left as far as I can tell. I can't get inpa to work to bleed the abs, so it looks like next step is booster.