Jody,Thanks for the quick reply, I really appreciate it. The coolant temperature sensor in the head did go bad and I replaced it so that my gauge is reading correctly. So the one in the WP may also be bad, but would that make it run poorly as well? I'll look at my recording again, but I think it contains fairly normal coolant temperatures.
I'm hoping that the Opti isn't having problems, but it feels like that could be the issue...again. The Opti is vented, but the coolant could have been dribbling on it.