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    3.0TDI white smoke on idle only.. possible EGR issue? advice please

    I have an Audi A6 2.7 TDI 2005. I began to have voluminous white smoke on idle. Tests on Injectors showed one dripped. After many head-scratches I used the VAG to increase the idling speed from 750 to 800 rpm and - Voila - no more white smoke on idle and good mpg (regularly shows over 50mpg...