What Causes Insufficient Turbo Boost Pressure?
2 Answers
1. Clogged air filter in the turbocharger, which increases intake loss and results in insufficient boost pressure. Typically, the air filter should be thoroughly cleaned every 1,500-3,000 hours of operation. 2. Excessive oil deposits: Too much oil residue in the internal air passages of the compressor section increases airflow resistance when passing through these oil-laden channels, leading to reduced boost pressure. Regular flushing of the turbocharger section is essential. For internally supported small and medium-sized turbochargers, the compressor housing can be removed for passage cleaning. For externally supported turbochargers, where disassembly and cleaning are more difficult, direct hydraulic flushing without disassembly is possible by spraying water at the compressor inlet passage.
Insufficient turbo boost pressure, I've summarized some common causes from actual repair experience. The most common issue is a faulty turbocharger itself, such as worn blades or seized bearings, causing poor rotation. Secondly, air intake system leaks are quite prevalent, like loose or cracked hose connections allowing air to escape. Problems with the bypass valve are also frequent; it controls excess pressure, and if it sticks or the diaphragm is damaged, pressure won't build up. Aging vacuum lines with cracks are another culprit. Additionally, clogged air filters and poor oil flow affecting lubrication can also hinder turbo performance. When boost pressure is insufficient, the car lacks acceleration power and fuel consumption increases. It's recommended to promptly visit a professional shop for inspection to avoid further damage.
