Brake And Speed/rev Problems

[Zas)-(]

hi how are you guys,

im clueless what is happening to my car, the car now runs shit, the symptoms are

Brake: whilst driving, the brake will be soft, then goes harder, harder till da car is draging and if u stop in traffic its hell as the car doesnt want to move, lifting up the brake pedal sometimes while speeding helps it. the brake fluid also changes its colour to a dirty red from yellow/green.( NEW)

what could it be? master cylinder is stuffed??

the other prob is my car cant seem to pickup any speed its so slow from 1-3000rpms it'll lag at 3000 go to 4000 lag agen.... then its quickly start pulling from 4000rpms onwards , from 1-3 its realli slow and at 4 it feels like YEAAAH HEAPS BETTER... but you can see the rev limiter struggling around 3 alot and car runs like shit..

what could this also be?

any suggestions would be good guys

thanks

p.s i just changed the oil. sparks, and fuel filter thats it <---

[BHDave]

The pedal issue is likely due to one of your brake pads dragging and heating/pressurising the fluid until they all start to drag. Thats why it's a prick to pull away.

Just be carefull be cause the fluid will boil eventually and then you will have no brakes all of a sudden.

Jack the car up and rotate each wheel to find which corner the problem is on and go from there.

Fix brakes first as they can kill you, then worry about the missfire.