Vacuum Booster Diagnosis. Buick Skylark 1998

For 1990-2009 cars only

Makes 🢒 Buick 🢒 1998 🢒 Skylark 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Vacuum Booster Diagnosis

Checks

Action

Inspect for the following conditions:

•	Broken or damaged hydraulic pipes or hoses

•	A damaged or loose vacuum hose

•	A collapsed vacuum hose

Replace any faulty pipes or hoses.

Inspect for a plugged or loose vacuum fitting.

Clean and correctly tighten the vacuum fitting.

Inspect for the following conditions:

•	A faulty vacuum check valve or grommet

•	Faulty air valve seal or support plate

•	Damaged floating control valve

•	Bad stud welds on the front or rear housing or power head

•	Faulty booster diaphragm

•	Worn or distorted reaction plate or levers

•	Cracked or broken power pistons or retainer

Replace the vacuum booster. Refer to Power Vacuum Brake Booster Replacement in Hydraulic Brakes.

Inspect for the following conditions:

•	A blocked passage in the power piston

•	An air valve sticking shut

•	A broken piston return spring or air valve spring

Replace the vacuum booster. Refer to Power Vacuum Brake Booster Replacement in Hydraulic Brakes

Inspect for a tight brake pedal linkage.

Repair or replace any faulty component.

Inspect for malfunctioning stoplamp switch.

Repair or replace the stoplamp switch. Refer to Stop Lamp Switch Replacement in Hydraulic Brakes.