This 2008 Audi 4.2 TDI has two control units and had already been modified when it arrived for a dynamometer test. The first run produced 205 hp and 562 Nm, while the factory figures quoted in the video are 327 hp and 650 Nm. The logs showed apparently normal turbo boost, fuel-rail pressure and air quantity, but requested fuel delivery did not match the actual supply.

After reviewing the logs, the technicians suspected a fuel-system or injector problem. They showed the measurements to the customer and explained that a software change alone could not fix a mechanical fuel-delivery fault. The customer asked for the software to be revised; changes were made to both control units, and the vehicle was tested on the dyno again.

The result after the work was 220 hp and 610 Nm. This was higher than the initial measurement, but still well below the factory output quoted in the video. The software had been revised, but the fuel-delivery problem remained and required a separate repair.