Symptom Diagnosis

Symptom checks cannot be used properly unless the problem occurs while the vehicle is being tested. To reduce diagnostic time, ensure steps in appropriate BASIC TESTING - GASOLINE and TESTS W/CODES articles are performed before diagnosing a symptom. Symptoms available for diagnosis are as follows:

• No Start Or Hard Start
• Starts But Stalls
• Hard To Start - Cold Engine
• Erratic Idle Or Surging
• Backfiring
• Incorrect Idle Speed
• Hesitation - Acceleration
• Knocking
• Engine Misfire - All Conditions
• Insufficient Engine Power
• Poor Fuel Economy
• Excessive HC & CO