I have a 2000 model year 445 that runs really good but the throttle has about three inches of travel before anything happens from idle. I took the filter off to watch the throttle body valve and it went from closed to fully open but still no increase in rpm. Then as the throttle is moved even further the rpm will climb to normal but in the last one inch of travel. There is no lost motion in the linkage and the cable is tight. Any ideas? Could one of the sensors cause this? That's one of the things I hate about fuel injection is the troubleshooting. A carb may be finicky but you can handle it visually. With FI you have to be an electronics genius.