Symptom Diagnosis

Symptom checks cannot be used properly unless the problem is actually happening while vehicle is being tested. To reduce diagnostic time, ensure steps in BASIC TESTING and G - TESING W/CODES (if applicable) articles have been performed before attempting to diagnose a symptom. Symptoms available for diagnosis include:

• No Start or Hard Start
• Rough Idle
• Rough Idle or Stumble
• Hesitation or Poor Acceleration
• Poor Fuel Mileage