+first the tuner must be mated too your truck, When initially plugged in/ the tuner will tell you this. If it doesn't somtin's wrong. Assuming everything is cool, you can plug in the tuner at any time, and you can toggle with the navigation key, too the data logging item, highlight that and it will give you time and distance,1/4 mile and so forth. when you hit tme and space it will give you the 0-60 option. when you select that, and you stop, it will start soon as the wheels roll! so you gotta be on your game ,so too speak.