Poor turbo performance

/ 9-3 (9400) / 2003 / 2. Engine / Turbocharger system, diesel / Fault diagnosis, fault symptoms / Poor turbo performance

Fault symptoms

Performance problem

Conditions

Diagnostic procedure

•	Check that the turbo shaft rotates freely.

•	Check that the mass air flow sensor is giving the right information. This may need to be cleaned. See Cleaning the mass air flow sensor

•	Check that vacuum hoses and connections are not leaking.

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