156 1.9jtd Brakes lose efficiency after fluid change
just had brake/clutch fluid changed, DOT4, and now for some reason when I am braking, say coming up to a junction, the brakes seem to lose efficiency and the car fails to stop.
The brakes are fine when I stamp on them i.e. emergency stop or hard braking at slow speeds, but when depressed constantly for a few seconds the car slows fine and the brakes feel normal but then suddenly the pedal seems to feel very hard and the bite seems to disappear and the car continues rolling forward.
Also pads were changed 6000kms ago along with new clutch slave, discs have also been checked and all are okay, and until fluid change braking was okay as well.
Unfortunately my local Alfa dealer in Portugal is rubbish, had problems with them since buying car new in 2004, and so called Alfa specialists aren't really specialists here. Had the guy re check the system and he was unable to find any problem, or so he said.
Can anyone suggest what the problem may be.