Hold the throttle wide open with your hand at the TBI. Check the tension on the tv cable there should be no slack If you have slack, press the pedal down and check for full throttle, no full throttle? make a adjustment to the throttle bracket. Bend it back if you have to, is the throttle cable shot? With the throttle wide open hold the tv adjustment button down and push the tv cable housing foward as far as you can, release the tv button, and check again. This all assumes you have a tv cable problem.