Symptom Chart

SYMPTOM	POSSIBLE CAUSES	ACTION
Noisy or leaking exhaust	Exhaust system/components	Install new components as necessary. Refer to the relevant section of the service information.
Lack of power	Air intake system fault Restricted exhaust system Low fuel pressure Exhaust Gas Recirculation (EGR) valve (s) fault Supercharger fault	Check the air intake system. Check for a blocked catalytic converter or muffler, install new components as necessary. Check the fuel pressure. For EGR and supercharger tests, refer to the relevant section of the service information.