High idle fuel consumption is likely caused by the following reasons:
1：Throttle body not cleaned and maintained for a long time, resulting in dirt accumulation. Problems with the throttle body can significantly increase fuel consumption. Owners should clean the throttle body regularly every 20,000 kilometers or seek professional servicing at a 4S dealership.
2：Faults or wear in spark plugs can also lead to increased fuel consumption. Owners should regularly inspect and replace spark plugs promptly to ensure the engine runs smoothly.
3：Carbon buildup in fuel injectors, intake ducts, and combustion chambers can affect combustion efficiency, leading to increased fuel consumption. Regularly cleaning carbon buildup inside the engine is necessary to ensure the engine operates optimally and avoid fuel consumption issues.
During idle, if the average fuel consumption keeps rising, it indicates abnormal engine operation. This could be due to factors such as the vehicle's age or throttle body blockage. It is recommended that owners clean the throttle body every 20,000 kilometers to ensure proper vehicle operation.
Furthermore, spark plug failure inside the engine can also lead to increased fuel consumption, so owners should address this promptly to prevent further damage.
Additionally, carbon buildup inside the engine is a common issue that can contribute to increased fuel consumption. Regularly cleaning carbon buildup inside the engine will help restore normal engine operation and reduce the occurrence of fuel consumption issues. By maintaining the vehicle diligently and addressing issues promptly, owners can effectively reduce the annoyance of continuously rising fuel consumption during idle.
