I've been out for a few drives with the data logger turned on. It is interesting to get back to the shop and then look at the log on the computer and see how the AFR responds to the throttle position. I can watch the fuel pump pressure drop after I hit the throttle and then see it come back up over time. The coolant temp gets up to 180 and then drops a bit when the thermostat opens. Seeing all of this stuff sure helps to sort out any issues.