Issue has been resolved. It was the existing throttle body position sensor. Took the old throttle body off and man it was covered in carbon build up and a film of oil. Swapped it out for a used one that came off a working car my friend had, swapped it over, plugged it in, car idles great, throttle response is back, AFR is stable and gas mileage has returned. Ill be adding throttle maintenance to the records now. Car drives great.