Engine Diagnosis - Introduction

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 Engine Performance Diagnostic Table Engine Diagnosis - Performance and Engine Mechanical Diagnostic Table Engine 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:

- Cylinder Compression Pressure Test Testing and Inspection
- Cylinder Combustion Pressure Leakage Test.Cylinder Combustion Pressure Leakage Test
- Engine Cylinder Head Gasket Failure Diagnosis.Testing and Inspection
- Intake Manifold Leakage Diagnosis.Testing and Inspection