Contaminated or improper brake fluid.

Refer to Master Cylinder Description .

Leaking booster system.

Refer to Hydraulic System Fluid Loss .

Restricted passage in the booster.

Refer to Power Brake Booster Replacement .

Damaged booster.

Refer to Power Brake Booster Replacement .

Glazed brake lining.

Refer to Brake Pad Inspection

Restricted brake fluid passage.

Refer to Brake Fluid Leak .

Brake pedal linkage interference or binding.

Refer to Hydraulic Brake System Bleeding .

Sticking caliper or caliper pistons.

Refer to the following procedures: