Contaminated or improper brake fluid.

Refer to Master Cylinder Description .

Restricted passage in the booster.

Refer to Power Brake Booster Replacement .

Damaged booster.

Refer to Power Brake Booster Replacement .

Restricted brake fluid passage.

Refer to Brake Fluid Leak .

Brake pedal linkage Interference or Binding.

Refer to Brake Fluid Leak .

Sticking caliper or caliper pistons.

Refer to the following procedures:

Parking brake not releasing.

Refer to Park Brake.