[Ford blue blood]

Had they been working or is this a new project? All four cylinders are hooked to the same output port so it sounds like two problems. Rear brakes not adjusted out far enough (or a blockage in the line to the rears...rubber line in the rear bad) and a sticky booster. The master cylinder must return to the rest position to allow fluid back into the master after the pedal is released. If the booster is gummed up it will hold the master away from it's rest position.