Symptom Diagnosis

Symptom checks cannot be used properly unless problem occurs while vehicle is being tested. To reduce diagnostic time, ensure steps in appropriate BASIC TESTING article and appropriate TESTS W/CODES article in the ENGINE PERFORMANCE section were performed before diagnosing a symptom. See BASIC TESTING and TESTS W/CODES TABLE in this article. Following symptoms are available for diagnosis.

• Difficult To Start Or Will Not Start
• Rough Or Unstable Idle
• High Idle After Warm Up
• Engine Stalls
• Engine Misfires Or Has Lack Of Power
• Engine Runs Rough On Deceleration
• Backfire In Exhaust System
• Poor Fuel Mileage
• Excessive Oil Consumption
• Abnormal Noise Or Knocking