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 and G - TESTS W/ CODES articles were performed before diagnosing 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