[GUM85]

I just replaced the front and rear brake pads on my 2006 Focus ST and now the brakes are really soft and the pedal is sticking slightly on return. I noticed that the brake fluid reservoir overflowed out of the cap I'm guessing from when I was compressing the caliper pistons back in to make room for the new pads. Is it possible I somehow got air in the lines from the reservoir overflowing?

 

[GUM85]

UPDATE - I was going over the brakes again to double check my work and found that the front passenger and rear driver side brakes seem to be working great but the front driver and rear passenger brakes don't seem to be working at all. I had someone press the brake pedal while I was spinning the wheel and the brakes didn't seem to be activating at all the wheel just keeps spinning with no resistance. Any thoughts?

 

[GUM85]

The lines and calipers look good I'm removing the master cylinder to make sure it wasn't damaged somehow.

 

[GUM85]

I removed the master cylinder and when I place my thumb over one of the ports on the master cylinder and pump the piston I feel good suction but when I tried it with the second port there wasn't any suction at all. Possibly a bad master cylinder?

 

[GUM85]

Yes, replaced the master cylinder and bled the brakes and feel like new again!