I guess I'm just not going to know much for sure until that TPS comes in next week. The parts stores have NGK MAP sensors in stock, so when my Mopar TPS gets here, I'll replace the MAP with a brand new NGK as well.
Just to update everyone: I installed the Mopar TPS and that didn't fix it. So I then installed an NGK MAP sensor and that didn't do it either. So now I have ordered a new wiring harness. I am hoping that it is wiring related and that this will fix it. If not, I'll try to chase something else and NOT shoot it full of holes like I want to. ;-)