Start with the key on engine off scanner connected and scanning. Look for the TPS voltage, not TPS %. Adjust the TPS to scan about 0.5 - 0.6v. Then slowly press the throttle watching the voltage reported. You will only get an update a second so do this really slowly. Watch for the voltage to increase smoothly with no drop outs.
If the TPS passes the two above tests you are good to go.
[This message has been edited by phonedawgz (edited 08-20-2013).]