Symptom Diagnosis

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

• Cranks Normally But Will Not Start
• Cranks Normally But Difficult To Start
• Rough Or Unstable Idle
• High Idle After Warm-Up
• Engine Stalls On Deceleration
• Engine Stalls Intermittently
• Engine Hesitates Or Stumbles On Acceleration
• Engine Surges While Cruising
• Lack Of Power
• Engine Runs Rough On Deceleration
• Abnormal Noise Or Knocking
• Fuel Odor
• Excessive Oil Consumption
• Poor Fuel Mileage
• Malfunction Indictor Light (MIL) Always On
• Malfunction Indictor Light (MIL) Never On