Engine Diagnosis - Introduction

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

Refer to the Engine Mechanical and the Engine Performance diagnostic charts, for possible causes and corrections of malfunctions. Engine Diagnosis - Mechanical Engine Diagnosis - Performance

Refer to FUEL SYSTEM for the fuel system diagnosis.

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 Leak Down Test
^ Cylinder Head Gasket Failure Diagnosis Testing and Inspection
^ Intake Manifold Leakage Diagnosis Testing and Inspection
^ Lash Adjuster (Tappet) Noise Diagnosis Hydraulic Lash Adjuster Noise Diagnosis
^ Engine Oil Leak Inspection Engine Oil Leak Inspection