If you have different people driving your car, or have been doing a lot of town driving, this can help to reset the throttle responsiveness back to factory defaults.
Turn ignition off
Turn key to "on" position
Wait 15 seconds
Turn ignition off
Wait another 15 seconds
Start the car.... you should find the responsiveness has been reset.
Turn ignition off
Turn key to "on" position
Wait 15 seconds
Turn ignition off
Wait another 15 seconds
Start the car.... you should find the responsiveness has been reset.