Follow-up
After 17 shop hours of diagnosis, including reinstalling the OEM intake, inspecting the IVT sprocket, pulling the tranny to check the flywheel, replacing the positive battery cable, and other tests, the factory tech has identified the ECM as the culprit. New one being installed tomorrow, under warranty because the problem was documented in my dealer service history before the bumper to bumper warranty expired. Keeping my fingers crossed.
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