The customer reported that turbo boost had dropped from approximately 17 psi maximum to only 7 psi. The vehicle had reduced acceleration, black exhaust smoke, and a rattle or flutter noise from the turbo area and snorkel from around 2000 rpm. The issue occurred every time the vehicle was accelerated.

Initial inspection confirmed an underboost condition with reduced performance and excessive black smoke under load. There were no warning lights present, and a previous scan had shown no stored fault codes. Based on the symptoms and the recent history of intercooler pipe leakage, the intake and charge-air system was inspected for a boost leak.