Initial Inspection and Diagnostic Overview
Each turbocharged engine system has a distinctive sound or noise level when operating. In many cases, malfunctions can be detected when this noise level changes. If the noise changes to a higher pitch, this can indicate an air leak between air cleaner and engine or an exhaust gas leak in the exhaust system between turbocharger and engine. Noise level cycling from one level to another can indicate a plugged air cleaner, restricted turbocharger air inlet or heavy dirt build up in the compressor housing and on the compressor wheel.