I just recently purchased a 96 4.6 mustang was told it needs brakes did a full brake job on it calipers brakes hardware grease ect... Bled the brakes pedal was stiff like it should be then I start the car the pedal gets rock hard and my front brakes are locked up but shut my car off they instantly free up if any one has had this problem or knows of it please get back with me not sure if it's mc,psp,hb, or even many abs related no light on