Vehicles using AUC engine list:

Engine AUC

Symptoms:
- Rough idling and stalling, especially when cold
- Loss of power and poor acceleration
- Increased fuel consumption
- Engine misfires or hesitation during acceleration
- Check engine light illumination

Diagnosis:
- Inspect ignition components: spark plugs, ignition coils, and leads for wear or damage
- Check for vacuum leaks around intake manifold and hoses
- Test fuel injectors for proper spray pattern and operation
- Scan ECU for fault codes related to misfires or sensor failures
- Examine the throttle body and idle control valve for carbon buildup
- Verify timing belt condition and tension, as timing issues can cause misfires

Fixes:
- Replace worn or fouled spark plugs and faulty ignition coils
- Repair or replace cracked or leaking vacuum hoses
- Clean or replace clogged fuel injectors
- Clear fault codes after repairs and perform ECU reset if necessary
- Clean throttle body and idle control valve to restore smooth idling
- Replace timing belt if worn or beyond recommended service interval to prevent engine damage
- Regular oil changes with correct grade oil to maintain engine health

Prevention:
- Follow manufacturer’s recommended maintenance schedule, especially for timing belt replacement (usually around 60,000 to 90,000 km)
- Use quality fuel and replace air filter regularly to prevent injector and combustion chamber deposits
- Periodically inspect ignition system components and replace spark plugs every 30,000 to 50,000 km
- Avoid prolonged idling and aggressive driving to reduce engine stress
- Keep vacuum lines and intake system clean and intact to maintain proper air-fuel mixture

By adhering to these maintenance and inspection routines, owners of vehicles equipped with the AUC engine can minimize common issues and ensure reliable performance.