Hi all you ford nutters

got a brake problem i was hopeing some one can help me with.

after about 5 feet or so the brake peddle goes solid. after a few presses the peddle starts to move but very juddery and the brakes are the same.

if i pump the brake on start of car then give it a little speed it seems ok.
only dose it at the start of a drive. works fine after.

the abs light starts as normal but if it dose not come on i know the brakes are gona be a pain as my abs light has been on for about 2 years lol.

just replaced the master cylinder/distribution block.

still doing it.
only thing i can think of is brake callipers or the sensors.

iv replace a rusted up sensor and cleaned the rest.

any ideas are welcome as with the snow getting a pain now.