Soft brake pedal after replacing brakes

DWANE WILLBUR

MEMBER
2010 MERCURY MILAN
2WD
AUTOMATIC
120,000 MILES

I replaced all four calipers, rotors, pads, and master brake cylinder.
Then bled the brakes with little to no pressure to the pedal. What am I doing wrong?
Thanks

Sunday, March 17th, 2019 AT 2:38 PM

1 Reply

ASEMASTER6371

MECHANIC
52,797 POSTS

Good evening,

You need to bleed the system with a scan tool. Once you replaced the master cylinder, air went into the ABS unit and the only way to get it out is with a scan tool to open the solenoids while you pressure bleed the system.

Air is trapped in the system.

Roy