Vehicles using CAVF engine list:

Engine CAVF

Symptoms:
- Rough idling and hesitation during acceleration
- Loss of power or reduced fuel efficiency
- Engine warning light (check engine light) illumination
- Unusual noises such as ticking or knocking from the engine bay
- Increased oil consumption or visible oil leaks

Diagnosis:
- Perform an OBD-II scan to identify fault codes related to ignition, fuel, or emissions systems
- Inspect ignition coils and spark plugs for wear or damage, as misfires are common
- Check for carbon buildup on intake valves due to direct injection design
- Examine the timing chain and tensioner for wear or slack, which can cause rattling noises
- Inspect turbocharger operation and boost pressure for irregularities
- Verify fuel injector function and cleanliness to ensure proper fuel delivery

Fixes:
- Replace faulty ignition coils and worn spark plugs to restore smooth combustion
- Clean intake valves using walnut blasting or chemical cleaners to remove carbon deposits
- Replace timing chain tensioner or timing chain if excessive wear or noise is detected
- Repair or replace leaking gaskets and seals to prevent oil leaks and maintain engine integrity
- Service or replace turbocharger components if boost pressure is insufficient or abnormal noises occur
- Use high-quality fuel and additives to maintain injector cleanliness and combustion efficiency

Prevention:
- Adhere to regular maintenance intervals, including timely oil and filter changes with manufacturer-recommended grades
- Use high-quality fuel to reduce carbon buildup and maintain injector health
- Avoid prolonged idling and short trips that prevent the engine from reaching optimal operating temperature
- Periodically inspect ignition components and replace spark plugs as per service schedule
- Monitor engine performance and address warning lights promptly to prevent further damage
- Consider periodic intake valve cleaning to prevent excessive carbon accumulation due to direct injection technology

By following these diagnostic steps and maintenance practices, owners of Seat Ibiza 1.4 TSI (CAVF engine) can mitigate common issues and ensure reliable engine performance.