The E-tune process requires you to have some data from running on the dyno/track to ensure and test that the changes being made are positive. If you are familiar with datalogging and collecting test info then you will have no problem. Without a proper environment for getting this info you will not be able to get the setup dialed in perfectly...I usually need to do about 3-4 flashes to get everything perfect on the dyno...and that is with the car sitting right in front of me....lol.
-Jack
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