Hard Brake Pedal

[Grif]

I just recently replaced my master cylinder with a 25mm, and went to stainless brake lines. I did a normal bleed, but the brake pedal is ROCK HARD now. The car simply will not stop unless I put my entire body into it, and even then it still won't stop.

Is this normal? Because the thing is, on my original MC I had the same problem. (Hence replacing it in the first place) I'm thinking it has something to do with my Booster, since my vacuum SEEMS fine. Can anyone help?

[jlevie]

It sounds to me like you aren't getting vacuum to the booster or that the booster has failed. A collapsed hose, leak in the vacuum lines, or bad check valve could prevent the booster from seeing vacuum. Otherwise the diaphragm/valve in the booster has failed.

[Grif]

Thanks man. In the process of removing the booster as we speak, however the pin connecting the brake pedal will NOT budge. Any tips? (Yes I removed the clip)

[Grif]

Never mind the pin. I got it.

Just finished replacing the booster, and you were right on the money. Works great now.

Thanks man!