At RevHigh , we see all kinds of vehicles with tuning issues, but this 2018 Mustang came in with one of the worst cases we’ve seen. The owner was experiencing bucking, stalling, and an overall rough driving experience . After diving into the ECU, the problem became clear—the car had been tuned at home using a clone tool , resulting in a flash-and-go mess that completely ignored how modern quad-cam VVT  engines function. The Dangers of a Bad Tune Many people don’t realize how