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 in the ENGINE PERFORMANCE Section were performed before diagnosing a symptom. Following symptoms are available for diagnosis.

• Difficult To Start Or No Start
• High Idle
• Rough Or Unstable Idle
• Engine Hesitates Or Misses
• Engine Stalls
• Engine Lacks Power Or Stumbles
• Engine Knocks
• Engine Surges
• Backfire