On the dynamometer, the Volvo V70 D5 produced around 170 hp and 380 Nm, compared with nominal figures of approximately 186 hp and 400 Nm for this engine. A loss of power is not always obvious in everyday driving, so the test helped establish that the engine was below its expected output.

Inspection found heavy soot and oily deposits in the intake manifold and pipes. The manifold was removed, components around the swirl flaps were inspected and cleaned, and the pipes and turbocharger pressure sensor were cleaned as well. Deposits can restrict airflow and affect engine response.

The turbocharger’s response remained a concern during testing, so its condition and variable geometry may need further diagnosis. The video does not confirm that the turbocharger was repaired or replaced. After cleaning, the ECU received a conservative calibration and the car was tested again: the dynamometer showed 190 hp and 420 Nm. Since the airflow issue had not been fully resolved, the calibration was kept moderate rather than pursuing a more aggressive power increase.