How to Deal with Insufficient Boost in Buick Engine?

[Nigel]

Turbocharger A is in a state of insufficient boost. Replacing the turbocharger will resolve the issue. Below are the specific causes of turbocharger failure: 1. Engine-related: The gap between the piston rings and cylinder liners increases, leading to poor sealing, reduced engine power output, and oil entering the combustion chamber through the gaps, resulting in blue smoke from the exhaust. 2. Turbocharger-related: The intake passage before the turbocharger is blocked, causing excessive vacuum at the compressor end of the turbocharger. Oil flows from the turbocharger intermediate housing into the compressor impeller and enters the combustion chamber along with the compressed air, causing the turbocharger speed to drop. The engine's intake air volume is significantly insufficient, manifesting as reduced power and blue smoke from the exhaust.