adding 2 step to already existing tune

[Jaykosi]

ok so my tuner is out of town and i need to add my two step i was wondering if i hook my laptop up to my car and change the 2 step will it mess up my map that my tuner had created i dont have his kal saved please help all i wana do is add the 2 step not mess with the map

[Spunkster]

You run the risk of corrupting the calibration. You should just wait until he gets back and have him email you the calibration.