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 mechanical (e.g., a strange noise), or performance (e.g., engine idles rough and stalls).


Refer to (Service Diagnosis - Mechanical Chart) and (Service Diagnosis - Performance Chart), for possible causes and corrections of malfunctions. Refer to FUEL SYSTEM for the fuel system diagnosis. Engine Diagnosis - Mechanical Engine Diagnosis - Performance


Additional tests and diagnostic procedures may be necessary for specific engine malfunctions that cannot be isolated with the Service Diagnosis charts. Information concerning additional tests and diagnosis is provided within the following:

- Cylinder Compression Pressure Test Cylinder Compression Pressure Test
- Cylinder Combustion Pressure Leakage Test Cylinder Combustion Pressure Leakage Test
- Cylinder Head Gasket Failure Diagnosis Testing and Inspection
- Intake Manifold Leakage Diagnosis Testing and Inspection
- Lash Adjuster (Tappet) Noise Diagnosis Testing and Inspection
- Engine Oil Leak Inspection Engine Oil Leak Inspection