Okay, attached the reader - not easy in a Crossfire due to where they put it - and drove around for twenty minutes - got a few chores done, but the limp never happened. But, the analyzer did report a 'throttle position sensor' 'switch power low' or something very close to that. I didn't have my phone with me so didn't take a picture, but it certainly makes some sense that an issue with that sensor might be at the core of my problem. Did a quick check and it looks like replacing that sensor is not a difficult task. I'll order one immediately..