Testing for Faulty Valve
- Disconnect vacuum sensing tubes from solenoid valve and vacuum pipe. Blow through solenoid valve from port "B". Make sure air passes through valve and comes out from air filter "C". See Fig 1 .
- Disconnect connector from vacuum control solenoid valve and connect battery power to terminals on valve. Blow through valve from port "B". Make sure air passes through valve and comes out from port "A" of valve.