2006 Altima - I may have just figured out my problem!!!

Hope is alive an kicking again. While sitting in the car and watching the numbers, I observed that the throttle position sensor doesn't seem correct. This would explain why the fuel trims are too high. I have to research if the TPS is a replaceable item on this car, or if the entire throttle body has to be replaced. Will make the repair and then give an update; but I'm feeling very confident (hopeful) that this will fix the problems.