Brake problems 94 Mercury Sable
 

unsure:I have replaced calipers( front and rear),brake hoses(both front)brake pads(front and rear),the master cylinder is only 3 years old and I still have a soft brake pedal. I tried to pressure bleed and I can not move the fluid not less I pump about 16-17 psi on the master cylinder and then the fluid shows no air and barely moves out the bleeder valve.This is with engine off. I only get a good stream with pressure and push the brake pedal also.I have tried this 2 times and still have a soft pedal. I smell front brakes sometimes and I have heat buildup on the front rotors. The ABS light is on and the ABS hasn't worked for sometime.A brake line broke and the master cylinder run dry 3 years ago, so I fixed the line and replaced the cylinder. I have not had a solid brake pedal since. Can air in the ABS cause my soft pedal, at random heat on the rotors and weak stream when pressure bleeding