EGR 2 - Check EGR Vent Solenoid
^ Key OFF.
^ Disconnect the Exhaust Gas Recirculation Vent (EGRV) solenoid.
^ Disconnect the vacuum hoses.
EGR Control and Vent Solenoids:
^ Block port D, blow into port C and verify that air flows through port E (interconnecting hose between port B and port D is not shown).
^ Apply 12 volts and ground to the EGRV solenoid as shown.
^ Blow into port C and verify that air does not flow through port E.
^ Does the EGRV solenoid function properly?
YES -- Go to EGR3. [1][2]EGR 3 - Check EGR Valve
NO -- Replace the EGRV solenoid.