Vacuum Regulator Valve
Attach a vacuum pump and gauge to port "S". Attach a vacuum gauge to port "Z". Apply 27.5 in. Hg to the vacuum regulator valve. Vacuum gauge on port "Z" should read 10 in. Hg. If not, replace vacuum regulator valve.
Attach a vacuum pump and gauge to port "S". Attach a vacuum gauge to port "Z". Apply 27.5 in. Hg to the vacuum regulator valve. Vacuum gauge on port "Z" should read 10 in. Hg. If not, replace vacuum regulator valve.