I have a 97 taurus that sat with the transmission out of it for 5 months. When I put it back together the left caliper seemed stuck, so I replaced both calipers, rotors and pads. I started driving the car and after several times of braking , I heard what seemed to be a vavuum leak and then the brakes started tightening. I investigated and found no line blockage but all 4 wheels were tight and wouldn't turn. I replaced the master cylinder and bled everything, problem still exists. I have to bleed off the master cylinder to get them to release. I pulled the master cylinder back away from the booster and it seems the booster pushrod is staying extended and not always retracting until I bleed the master cylindern then its good for about 8 or 10 times of braking. this is when the hiss or vacuum leak appears and starts locking up. I can see the booster diaphram leaking, but why doesn't it allow the rod to retract. Would this be a booster problem or something else like the proportioning valve?
- posted
17 years ago