quattroatlast

It happened again. Within five miles the fronts were smoking, rears almost that hot. We had touched the brake pedal once and they didn't release. I really need some ideas. ABS? Master cylinder? Proportioning valve? I have replaced the front calipers and pads already coz I thot it was corroded cylinders. Didn't fix the problem.

Will Ng

obviously the calipers aren't retracting the pistons. Remove the wheels, start with a front caliper, verify it's tight. Then try to pry the piston back in. Chances are it will give alot of resistance. Next, place some rags under the MC, loosen the front brake line and pry the caliper again. Brake fluid should spew out and the piston should retract easily. You've just eliminated the caliper, ABS, as the cause. MC is my bet.

Black-Wolf

def the master.. mine was same. BUY NEW.

SteveAngry

Bad master cylinder.

boxerfan

Interesting. Looks like I may be up for that too.

quattroatlast

Thanks to all. Shop now confirms bad mastercylinder. Just like I told them ;-).