Its possible that the TPS was set with dirty throttle bodies, now cleaning them has thrown the setting off.
Or, randomly the TPS has decided to go bad - a very common problem.
Also check your last work - did any wires get pinched? Did you get the tank return line plugged in properly under the tank? Etc, etc....
Then we move to fuel pressure, air leaks, dirty temp sensor...
The Vic Shop, Inc