Larry and Steve - thank you for your input.
Larry - the aspirator/sampler motor is working. I pulled the glove box and checked.
Steve- the problem seems to occur only at road speed and not when at rest.
I just wish there was some way to bypass the the auto system. Oh for the good old days of cable pull on and off controls. These did not fail, or at least in the vehicles I have owned.
At any rate- thanks guys - Ron