Solenoid Vacuum Valve Test
- Check all vacuum hoses for proper routing and connections. Ensure engine is at idle. Disconnect vacuum supply hose at solenoid valve. Place finger over open end of hose. Suction should be felt. If not, repair vacuum source.
- Disconnect wiring from solenoid vacuum valve. Note location of wire leading to ignition switch "B+" terminal. Using a jumper wire, connect "B +" wire to the solenoid vacuum valve.
- Engine RPM should not increase. If an increase is noted, replace solenoid valve. Using a second jumper wire, ground other terminal of solenoid valve. Engine RPM should increase. If not, replace solenoid valve. Reconnect all system-related components to original positions.