Q: How to Adjust Brake Pedal Height and Free Play in a Nissan 350Z?A: Remove the brake light and speed control switches. Peel back the carpet and insulator pad and measure the distance from the top of the pad to the floor with the brake pedal fully released. Loosen the pushrod locknut just in front of the power brake booster clevis. Turn the booster pushrod until the pedal height is correct, tighten the locknut, press down lightly on the brake pedal, and measure the distance that it moves freely before resistance is felt. With the engine running, press the brake pedal fully and measure the pedal pad-to-floor distance.