单项选择题
A.Faulty turbocharger turbine diffuser ring
B.Faulty turbocharger compressor ring
C.Insufficient cooling water flow
D.Clogged air intake filters
单项选择题 Which of the following conditions can cause below normal air pressure in the intake manifold of a turbocharged diesel engine?（）
单项选择题 If sludge accumulates on the underside of a diesel engine piston, it will（）
单项选择题 Which condition indicates the air side fouling of an after-cooler on a turbocharged diesel engine?（）