Brake to floor after mast cyl change

[06DDLBZ]

New stainless steel brakesines installed. Bled brakes. Brake pedal went to floor. No leaks on any calipers, bled brakes again with 2 quarts no bubbles . Checked power steering while I was at it, it was brown. No change after changing power steering fluid. Not sure why PS was that brown it has only been six months since changed and it was a new pump. No whine from PS pump or any leaks.

Changed master cylinder and auto bled with tech2. The brake pedal comes back up during auto bleed, but then goes to floor when auto bleed procedure is complete

Tech2 shows no dct

Felt like I was throwing parts at it with changing the master cylinder.....now sure where to go from here?


Pedal goes to floor with truck on and off.

 

[N2BRK]

Did you bench bleed the master first?

 

[Ron Nielson]

Crack one of the lines at the connection to the MC and have a friend slowly push on the brake pedal. While holding the pedal down, tighten the line. (sounds a lot like bleeding brakes, but your are bleeding the MD). Repeat 4 or 5 times. Then do the other connection same way.

If you have pedal, but not solid, bleed all 4 wheels, and use your autobleed.