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tjts1 -
I trust the digital AFR because it ends up behaving the same way it does when the car is all warmed up. The ScanGauge is reporting what the ECU/PCM is telling it. If the ECU/PCM says closed loop via OBD-II, then I believe it's closed loop.
What you *might* be seeing is a delay in the way the AFR is displaying. Don't look at the numbers, they are cumulative. Are you watching the vertical bargraph on the right side? Once I reach closed loop it flips up and down pretty fast.
I just watched the second video again, and the refresh rate on YouTube is not fast enough to show you how fast the bargraph is flipping. This could be either the original video from the camera and/or the YouTube compression.
If it doesn't cost anything, maybe I will upload a Hi-Def version of the same video.
CarloSW2
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