Brake master cylinder woes Options

[jmargush]

I put a new 19mm master cylinder from PMB on my car within the last two years.

The pedal had been getting a little more travel in it over the past week or two.

Yesterday at the Autox the pedal got enough travel that it tripped the warning light on.

Does this point to a failed master cylinder?

If I pump the pedal it will build pressure and reduce travel. after this is done it doesn't seem to drift to the floor with continued pressure.

I bought from PMB because I learned form Eric that the ones you by at FLAPS don't have the correct material in the seals and that a new one should last years.

[914Mels]

How old are your calipers? If they have not been touched in years the piston seals may be sticking to the pistons keeping them from self adjusting out as the pads wear. By pumping the pedal and getting a good pedal that way it sounds like the pads aren't close enough to the rotors so you're having to pump them out to take up the excess clearance. If indeed you have a hard pedal after pumping them, you probably do not have a internal leak. A internal leak would still have the pedal fade after you pump up some pressure. Don't for get about the rear calipers adjustment process either. If that gap is too big you'll end up with a low pedal.