No, you cannot adjust the master cylinder to make the rear brakes work better because the system is a diagonally crossed system meaning the front right and rear left uses 1 circuit.
Since the parking brakes are not functioning well, I would suggest checking the park brake cable adjustment. If the cable is adjusted too tight, the rear calipers would not automatically adjust its clearance. Unloosen the brake cable adjuster below the rear console and test drive with applying the brakes a few times. The brake pedal should feel higher than previously. Readjust the handbrake cable leaving a minimal free travel to ensure the brakes self adjust.
Wednesday, October 22nd, 2008 AT 4:15 PM