- Symptom List

Symptoms- Engine Mechanical

Strategy Based Diagnostics
1. Perform Diagnostic System Check - Engine Controls before using the symptom tables if applicable.
2. Review the system operations in order to familiarize yourself with the system functions.
All diagnosis on a vehicle should follow a logical process. Strategy based diagnostics is a uniform approach for repairing all systems. The diagnostic flow may always be used in order to resolve a system problem. The diagnostic flaw is the place to start when repairs are necessary.

Visual/Physical Inspection
^ Inspect for aftermarket devices, which could affect the operation of the Engine.
^ Inspect the easily accessible or visible system components for obvious damage or conditions, which could cause the symptom.
^ Check for the correct oil level, proper oil viscosity, and correct filter application.
^ Verify the exact operating conditions under which the concern exists. Note factors such as engine RPM, ambient temperature, engine temperature, amount of engine warm-up time, and other specifics.
^ Compare the engine sounds if applicable to a known good engine and make sure you are not trying to correct a normal condition.

Intermittent
Test the vehicle under the same conditions that the customer reported in order to verify the system is operating properly.

Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

^ Base Engine Misfire without Internal Engine Noises

- Base Engine Misfire Without Internal Engine Noises


^ Base Engine Misfire with Abnormal Internal Lower Engine Noises

- Base Engine Misfire With Abnormal Internal Lower Engine Noises


^ Base Engine Misfire with Abnormal Valve Train Noise

- Base Engine Misfire With Abnormal Valve Train Noise


^ Base Engine Misfire with Coolant Consumption

- Base Engine Misfire With Coolant Consumption


^ Base Engine Misfire with Excessive Oil Consumption

- Base Engine Misfire With Excessive Oil Consumption


^ Engine Compression Test

- Testing and Inspection


^ Engine Noise on Start-Up, but Only Lasting a Few Seconds

- Engine Noise on Start-Up, But Only Lasting A Few Seconds


^ Upper Engine Noise, Regardless of Engine Speed

- Upper Engine Noise, Regardless of Engine Speed


^ Lower Engine Noise, Regardless of Engine Speed

- Lower Engine Noise, Regardless of Engine Speed


^ Engine Noise Under Load

- Engine Noise Under Load


^ Engine Will Not Crank - Crankshaft Will Not Rotate

- Engine Will Not Crank - Crankshaft Will Not Rotate


^ Oil Consumption Diagnosis

- Oil Consumption Diagnosis


^ Oil Pressure Diagnosis and Testing

- Testing and Inspection


^ Oil Leak Diagnosis

- Oil Leak Diagnosis


^ Drive Belt Chirping Diagnosis

- Drive Belt Chirping


^ Drive Belt Squeal Diagnosis

- Drive Belt Squeal


^ Drive Belt Whine Diagnosis

- Drive Belt Whine


^ Drive Belt Rumbling Diagnosis

- Drive Belt Rumbling


^ Drive Belt Vibration Diagnosis

- Drive Belt Vibration


^ Drive Belt Falls Off Diagnosis

- Drive Belt Falls Off


^ Drive Belt Excessive Wear Diagnosis

- Drive Belt Excessive Wear


^ Drive Belt Tensioner Diagnosis

- Testing and Inspection