Engine Code AAZ

Special Tools, Testers And Auxiliary Items:
- US8026 hand vacuum pump

Test Sequence:
- Disconnect vacuum hose from exhaust gas recirculation valve.
- Connect US8026 hand vacuum pump to EGR valve.





- Operate hand pump.
The diaphragm rod must move toward vacuum connection. Observe membrane rod through opening (arrow).
- Disconnect US8026 hand vacuum pump from EGR valve.
Valve must clearly be heard to close (diaphragm rod moves toward intake manifold).