Diagnostic Strategies

DIAGNOSIS AND TESTING - ENGINE DIAGNOSIS (INTRODUCTION)
Engine diagnosis is helpful in determining the causes of malfunctions not detected and remedied by routine maintenance.
These malfunctions may be classified as either performance (e.g., engine idles rough and stalls) or mechanical (e.g., a strange noise).
Refer to SERVICE DIAGNOSIS (PERFORMANCE) or SERVICE DIAGNOSIS (MECHANICAL) for possible causes and corrections of malfunctions.
Additional tests and diagnostic procedures may be necessary for specific engine malfunctions that can not be isolated with the Service Diagnosis charts. Information concerning additional tests and diagnosis is provided within the following diagnosis:
- Refer to SERVICE DIAGNOSIS (PERFORMANCE)
- Refer to SERVICE DIAGNOSIS (MECHANICAL)