What causes a 94 Lebaron to run unsteadily with even tnrottle and not accelerate until given full throttle even though the throttle position sensor was just replaced?

there are alot of things that could be causing this...most auto parts chains offer free loaner diagnostic scanners to check the vehicles codes...detailed diagnosis instructions can be found in your local library, they should have a shop manual available in the REFERENCE section...check all the basics AGAIN..:)