Vehicles using ANW engine list:

Engine ANW

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

Diagnosis:
- Check for vacuum leaks around intake manifold and hoses
- Inspect ignition components: spark plugs, coils, and wiring for wear or damage
- Test fuel injectors for proper spray pattern and operation
- Scan ECU for fault codes related to sensors such as MAF, oxygen sensors, or throttle position sensor
- Examine timing belt condition and tension, as wear can cause timing issues
- Verify coolant temperature sensor readings to ensure accurate engine management

Fixes:
- Replace worn or faulty spark plugs and ignition coils to restore proper combustion
- Repair or replace cracked or leaking vacuum hoses to eliminate air leaks
- Clean or replace dirty fuel injectors to improve fuel delivery
- Replace faulty sensors triggering error codes to ensure correct engine control
- Change timing belt at recommended intervals (usually around 60,000 km) to prevent timing-related problems
- Perform a full service including oil and filter change to maintain engine health

Prevention:
- Adhere to regular maintenance schedules, especially timing belt replacement and ignition system checks
- Use quality fuel and replace air filters regularly to prevent injector and sensor fouling
- Monitor engine warning lights promptly and address issues early to avoid further damage
- Keep cooling system in good condition to prevent overheating and sensor failures
- Periodically inspect vacuum lines and intake components for cracks or deterioration

Following these guidelines will help maintain the reliability and performance of the ANW engine in Seat Ibiza, Cordoba, and Arosa models from 1999 to 2005.