That little screen said: “DO NOT SHUT OFF VEHICLE OR DEVICE. INSTALLING TUNE.” My old truck’s fans started going nuts, sounds like a jet engine decided to sit in my engine bay. Dashboard lights did a crazy disco dance – check engine, traction control, you name it, all lit up like Christmas. Honest truth? I started sweating. Thought I was minutes away from bricking my baby. Held ont... https://kralmod.com/diablo-tuner-5-3-performance-tuning-guide-easy-steps-you-need/