What causes the pressure drop at the throttle connection of the Passat turbocharger?

[DelLuna]

Passat turbocharger throttle connection pressure drop is caused by a damaged exhaust one-way valve or a leaking boost pipe. The reasons for insufficient turbocharger pressure are as follows: Air filter blockage: Blockage of the turbocharger's air filter increases suction loss, resulting in insufficient boost pressure; Excessive oil deposits: Excessive oil deposits in the compressor's internal air passages increase airflow resistance, leading to reduced boost pressure; Poor fuel combustion: Poor fuel combustion causes carbon buildup on the rotor or increased rotational resistance due to turbocharger bearing damage, both of which can result in decreased boost pressure.