Perform a throttle reset.
1. Turn the key to the on (not start) position, the position just before the starter turns over.
2. Press the gas pedal to the floor with the key in the "on" position.
3. Hold the pedal to the floor for five seconds, then turn the key back to the "off" position (don't remove the key), then release the gas pedal.
4. Don’t remove the Key. Wait 2 mins. for a full alignment.

Found this in the pdf for 74mm upgrade .....