Symptom Diagnosis

Symptom checks cannot be used properly unless the problem occurs while the vehicle is being tested. To reduce diagnostic time, ensure basic diagnostic procedures in BASIC TESTING and self-diagnostics in appropriate TESTS W/CODES articles were performed before diagnosing a symptom. See following list.

• 3.0L, see: TESTS W/CODES - MOTRONIC 5.2 SYSTEM .
• 2.3L, see: TESTS W/CODES - TRIONIC SYSTEM .

Symptoms available for diagnosis include:

• Difficult To Start
• Rough Or Unstable Idle
• Engine Hesitates Or Misses
• Poor Fuel Mileage
• Engine Will Not Start
• Engine Starts But Stops
• Poor Response On Acceleration
• Lack Of Power