Sable V6-183 3.0L DOHC VIN S MFI (1997)
Vacuum Brake Booster Check Valve: Testing and Inspection
1. Remove power brake booster check valve from power brake booster and vacuum hose.
2. Blow into each port in the power brake booster check valve.
3. Air should only pass through the power brake booster check valve when blowing on the power brake booster side.
4. If bad, replace.
