Blue62, I ran the tests. When the SAI runs, the voltage drops way low. So the SAI is basically working properly (according to that test anyways). I could not feel air from the tailpipe after activating the SAI with the engine off.
What is interesting is the behavior of the O2 sensors as the car is warming up. The post cat voltages hover around 1v. But go up and down up to .99 and 1.06 (blue and red). The pre-cat O2 sensors bounce up and down but not that crisply. Seem like they are getting a bit "lazy" (green and yellow).
Anyways, second set of O2 sensors should be here this week. Then I'll swap them all and see what happens.
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