Relief Solenoid Valve
- Disconnect vacuum sensing tubes from relief solenoid valve and vacuum pipe. Blow through solenoid valve from vacuum sensing tube "B" in Fig 1 . Air should pass through valve and escape from front port.
- Disconnect electrical connector from relief solenoid valve and connect battery power to solenoid terminals. Blow through vacuum hose again. Air should pass through valve and escape through air filter. If valve does not respond as described, replace valve.