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A phone app that can control an engine ecm and recalibrate. To me this is star wars stuff but it is here NOW. In this video i walk you through the free version of Guidanz an app by Cummins. Once you hook up to that engine the phone service sends data back to Cummins on your engine. These days no matter what electronic tooling you use it pretty much sends data back to the manufacturer. This is the free version and the paid version has much more power. In the future I will do a paid version review. Tentatively summer of 2024 that should show up on channel.