My turbo has low/insufficient boost pressure

There are many possible reasons for decreased turbo efficiency. Finding the cause early may lead to damage prevention, but in many cases the damage may have already have been done. Possible causes of low boost pressure can be broken hoses, contamination build-up within the turbine or compressor areas, leaking seals, damaged shaft bearings, the wastegate sticking open or operating incorrectly, a leak in the intercooler, a blocked air filter, a damaged diesel particle filter, or a damaged catalytic converter for example. In the case of variable geometry turbochargers, carbon can build up and cause performance loss.

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