This petrol BMW was not tuned because the data logs showed differences between cylinders before work began. Readings for cylinders three and six stood out at several points during the checks. Values shown in the video were approximately 6.1–6.6 for some cylinders, while other readings were around 9.6–10.5. The recording does not specify a unit.

These readings do not identify a specific failed component by themselves. They indicated that the ignition and fuel delivery systems should be checked first. The technician explained that increasing power in this condition could make the engine run worse, cause uneven operation or increase the risk of detonation, so the tuning work was deferred.

The owner was given the data-log information to help address the observed deviations first. The car can return for another check and calibration after repairs. The video does not confirm the exact cause of the fault or that any repair has been completed.