904 throttle pressure questions

It may or may not increase the pressure. When u push it back by hand is it like there is nothing there and then u cant push it anymore? Or is there resistance after about a third of the way? It may just be a dummy shaft. U may have to pull the pan to see if he used a kit or actually changed the valve body. It nag shift softer in town at lower speeds, then harder when ur getting on it. Kim