Hi, just recently my braking power on my 01wrx has become very poor & it was like all of a sudden whilst driving 1 time that it happened. All of the callipers are fine & there's plenty of meat left on the pads. The front discs could do with being changed as they make a noise when braking to a stop but they was doing this before. The pedal feels very spongy so i got a brake fluid change but they are still very poor.

Any help please?