Brake pedal travelling to the floor.

[luminova11]

Hi,

Hoping someone can help?  I have just replaced the two rear calipers and rebuilt the fronts on my 2007 2.2 D-Cat. Bled the system and little to no brakes with the pedal travelling to the floor. No leaks, so changed the master cylinder for a used one. Fully bled the system again and although the brakes are a bit better the pedal still travels to the floor when the engine is running. The pedal is hard as a rock with the engine off. Is there anything else I should be looking at, or have I have I been unlucky and got another dodgy master cylinder? Any help would be appreciated. 

Many thanks for looking.

[flash22]

is it/was it losing fluid ? did you power bleed the brakes? some cars do require the ABS to be put into a bleed mode to actuate the abs

how much fluid did you bleed out of the system

 

[Tif]

My gess is that one of the calipers isn't bled properly or is leeking. Try to test the brakes with the wheels in air and engine off.