Duty Solenoid Vent Valve: Turbo
Remove vacuum valve hose at vacuum chamber. Remove vent valve hose at air cleaner. Remove vacuum hose at EGR control valve. Blow through vent valve hose and ensure air passes. Disconnect duty solenoid valve connector. Apply battery power to terminal "D" and ground terminal "C". See Fig 1 . Blow through vacuum hose and ensure air passes through valve. Replace duty solenoid valve if defective.