My MIL is not lit up, but it does work during bulb test and timing check mode. I haven't pulled codes as I assume I don't have any. My TPS has been replaced with a verified good condition used unit and dialed in properly using a meter.

I ruled out a leaking cold start injector as that would show up at idle. It seems I can get the o2 signal to "bounce" during idle and up to around 2000 rpm in neutral. Cruising at any speed causes a steady needle on my meter, and rich on fuel. I know the computer is supposed to bounce the fuel trim rich/lean during cruising to keep the converter happy. The computer overrides this during heavy load, acceleration, and high rpms. My thought process is that my air flow sensor is telling the compy I'm pushing it a little harder than I really am, causing it to go rich to prevent backfire.

I took apart my MAF and ohmed it out. Everything checks out. I tightened the spring a few clicks and will hopefully get another test drive on it soon.