Originally Posted by Studbuster
What happens when you use a tuner, have a catastrophic failure and don't have the opportunity to return to stock settings? Problem!
When your uploading a tune, the contact is on II but you may noy start the motor ! You choose a tune, the stock tune has been read by your tuner, checked and saved so there can't be a problem
Then he writes the tune on your pcm, or you can adjust the tune before installing: disable mds, disable speedlimit,wheel size,.... and then you choose to write the tune after you adjusted these options. Once y've done it, it's really simpel