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 BASIC TESTING and appropriate TESTS W/CODES articles were performed before diagnosing a symptom. For Accent see TESTS W/CODES article, for Elantra and Tiburon see TESTS W/CODES article, for Sonata 2.0L see TESTS W/CODES article, for Sonata 3.0L see TESTS W/CODES article. Symptoms available for diagnosis include the following:

• Will Not Start (Cranks Okay)
• Difficult To Start (Cranks Slowly)
• Difficult To Start (Cranks Okay)
• Difficult To Start (When Hot or Cold)
• Excessively Slow Idle
• Excessively High Idle
• Rough Or Unstable Idle
• Engine Hesitates Or Accelerates Poorly
• Engine Surges
• Engine Stalls (After Starting)
• Engine Stalls (On Acceleration)
• Engine Stalls (On Deceleration)
• Engine Lacks Power
• Engine Misfires Or Hesitates
• Afterburn In Exhaust System
• Poor Fuel Mileage
• Detonation Or Knocking
• Fails Emission Test