I've had trouble in the past getting all the air bubbles out with the up/down pedal approach.Well I am about ready to push this bloody car off a cliff.
Brakes are driving me crazy.
New master cylinder.
new front calipers
new rear shoes
bled the brakes, pedal still goes to the floor.
must still have air in the system, bled them again...pedal still goes to the floor.
no leaks that i can see.
Cant work it out
what am i doing wrong.
Using a pressure fed system like ezibleed really helps shift the stubborn bubbles.
Calipers can also retain a little air pocket so try removing them, hold the brake pedal down and crack the bleed nipple whilst moving it around.
Does pulling up the handbrake give you any pedal improvement?
If it does you need to re-adjust the back brakes.
It could be faulty seals on the new master cylinder, but if you can get "some" brake pedal by repeatedly pumping the brakes I would doubt this was the cause and definitely points to air trapped in the system.