Symptom Diagnosis

Symptom checks cannot be used unless problem occurs while vehicle is being tested. Before using this article to diagnose any symptom, perform basic diagnostic procedures in BASIC TESTING article and self-diagnostics in TESTS W/CODES article in order to reduce diagnostic time. The following symptoms are available for diagnosis:

• Difficult To Start/No Start (Cranks Okay)
• Rough Or Unstable Idle
• Engine Hesitates Or Poor Acceleration
• Engine Surges
• Detonation Or Knocking
• Poor Fuel Mileage