Fuel Pressure Regulator Solenoid

Remove vacuum lines and electrical connector from solenoid. Remove solenoid from vehicle. Apply battery voltage and ground to solenoid. Use wiring diagram in WIRING DIAGRAMS article to ensure correct polarity. Blow into middle vacuum port of solenoid. Top vacuum port on some solenoids may be a simple filtered bleed, rather than a vacuum nipple. As battery voltage is applied and removed from solenoid, air should alternately pass out of remaining 2 ports. Solenoid resistance value is 30-40 ohms.