| Diagnosis and Testing Inspection and Verification - Verify the customer concern by operating the system.
- Visually inspect for obvious signs of mechanical damage.
Visual Inspection Chart | Mechanical | - Leaks
- Metal fatigue or weld failure
- Pipes, mufflers or catalytic converter
- Joints and flexible coupling
- Mountings and clamps
- Clearance around components
| - If an obvious cause is observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the concern is not visually evident, verify the symptom and refer to the Symptom Chart.
Symptom Chart Symptom Chart | Symptom | Possible Sources | Action | | Engine has lack of power | * Fuel system | * | | * Ignition system | * | | * Electronic engine control | * | | * Restricted exhaust system | * CHECK the exhaust system for restriction. INSTALL new components as necessary | | * Catalytic converter | * CHECK the four gas reading. INSTALL new components as necessary. | |
