- Jun 15, 2008
- 12
- 0
- 0
Hello. I have a 2000 Mustang GT Conv. 5 speed in my shop right now with all 4 wheels locked up. The customer brought me the car after putting new front and rear pads and rotors on it. He said then the pedal dropped to the floor so he put on new calipers and a new master cylinder. He brought it to me with all 4 wheels smoking after a 6 mile drive to my shop. I put on new front pads, rotors, calipers, and hoses. Still did it. So I checked the system and found that when I released the front master cylinder bleed screw, the front wheels freed up. So I put on a new master cylinder and hydro-boost unit (per customer request on the hydro-boost unit???) It is still doing it. But now all 4 wheels are free until I start it up and then they lock up, even if I start it without touching the brake pedal. I removed the belt to see if the power steering pump was over pressuring the hydro-boost and they still locked up. The only things left are the Abs Block or the prop valve and I don't want to just throw parts at it. PLEASE PLEASE PLEASE SOMEONE HELP ME. If I don't get this car out of my shop by tomorrow afternoon, I have to pay for a rental car until I fix it. The customer is super pissed that we can't figure it out. Thanks for any help in advance.