The coil on plugs are the spark plug boots. There are no plug wires from the plug to the coil like old style engines. If there was an interruption in the electronics causing a plug misfire, it should have thrown a pending code. The plug is getting consistent spark, but is is missing.
What is also possible is that the economy software causes it to hold a higher gear., but the winter blend ethanol laced fuel doesn't have enough power to accelerate at that low of an RPM.
I've got seafoam in it now. We'll see.
