The TPS is the throttle position sensor. It's located on the side of the throttle body. It has a small wiring harness attached to it. At idle, it should read .93-.97 Volts DC. I don't remember precisely which wires you check the voltage on though. I'm pretty sure if you do a search on the site for that adjustment, the answer is here somewhere. Adjusting it is very simple, all you do is loosen the two screws that hold the TPS to the throttle body and rotate the TPS until you get the desired voltage. If you need to rotate it more than the existing screw holes will allow, just use a drill and elongate them slightly so you can adjust it a little more.
"Posterity! You will never know how much it cost the present Generation to preserve your Freedom! I hope you will make good use of it. If you do not, I shall repent in Heaven, that I ever took half the Pains to preserve it."