EGR Valve: Testing and Inspection

1. Disconnect vacuum hose from EGR pressure transducer.





2. Connect vacuum pump gauge to its hose.
3. Check that EGR valve diaphragm moves smoothly and that it is held at the same position when 20 cmHg vacuum is applied to EGR valve. If diaphragm doesn't move smoothly, or it isn't held at the same position, replace EGR valve.
4. After checking, be sure to connect vacuum hose.