When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
No... You're only reloading the stock tune back into the PCM... You don't actually start the car or change any physical parts for the 5-10 minutes while you update the tuner itself... It's really not a big deal.