The girlfriend was driving down the road and came to brake and the pedal went straight to the floor with no resistance. I changed the master cylinder and it made no difference so i changed the servo, both these parts where from my local scrap yard. The car now has a brake but it is alittle spongy so i have bled it again and again but their is no air coming out now. The system does not seem to have any fluid leaks but like I say its spongy. the car is a Focus 1600 zetec on a 02 plate with 100,000miles

Any ideas please