Okay- I did the reader again and took a pic with my phone so I'd remember what the heck it said - code "P0122 - Throttle / Pedal Position Sensor / Switch A Circuit Low" and this was constant from starting up, and once again, a good twenty minutes running with no return to the limp mode, proper throttle all along. However, if it is the Pedal Sensor, that looks like I need to replace the entire Pedal Assembly, but that also looks like a fairly quick job. So, I ordered a pedal assembly. Also seems like a good part to have handy in the spares shelf....
https://www.crossfireforum.org/forum...html#qrcontent