Bad master cylinder?

[Sonny]

I jacked up the front of my car for 10 minutes, lowered it and backed it out of the garage and zero brake pressure! Soft and to the floor. No front or rear brakes. Fortunately barely rolling so I threw it in park. Turned the car off, pumped the pedal and the pressure came back. MC full of fluid, no leaks anywhere. I have front stock disc conversion kit, non power master cylinder. Used the stock distribution proportioning block when I switched (pic attached). Bad MC? I have a reman from somewhere. Will a Willwood or other bolt in?

 

[Fran Blacker]

Bad master cvl sounds like it.

 

[dadsbee]

Sounds like you dislodged an air bubble with the nose in the air. That's exactly what I had to do to bleed my master cylinder. I'd bleed everything one more time before pulling the master out.

 

[Bill76]

Is this a new installation ? Did you bench bleed the master cylinder before install ?
Try bleeding everything again

 

[Sonny]

Is this a new installation ? Did you bench bleed the master cylinder before install ?
Try bleeding everything again

The entire system is only 18 months old and has worked great until this. Rocked my confidence!!!

 

[Ironbuilt]

The entire system is only 18 months old and has worked great until this. Rocked my confidence!!!

I agree with @Bill76 bench bleed the MC, then re-install and bleed the entire system starting at the passenger rear wheel.