How to Solve High Fuel Consumption in Old Jetta?
3 Answers
The engine is the key component of a car's power and is closely related to fuel consumption. Regularly cleaning and maintaining the engine and its accessory systems can help reduce fuel consumption. Cleaning the air filter is essential as it directly affects the engine's air intake during driving.
My old Jetta has been running for almost ten years, and the fuel consumption is getting higher and higher - it's such a headache. I've found the most common cause is excessive carbon buildup in the engine; cleaning the throttle body and fuel injectors can significantly improve this. Additionally, if the oxygen sensor ages and becomes inaccurate, it can cause improper fuel injection adjustments, wasting gas unnecessarily. Tire pressure should also be checked regularly, with the standard value around 2.3-2.5 bar, as insufficient pressure increases rolling resistance. Take it to a repair shop and have the mechanic read the ECU data stream to diagnose whether there are issues with the throttle position or temperature sensors. Fixing these minor problems can save you a lot of money.
After driving the old Jetta for so many years, I've found that high fuel consumption is often related to driving habits. For example, sudden acceleration and hard braking cause the fuel injectors to spray more fuel, while maintaining a steady speed of 60-80 km/h is the most fuel-efficient. When stuck in traffic, prolonged engine idling also wastes fuel, so it's better to turn off the engine at traffic lights. If the tires are severely worn, replacing them early can help; when the tread is nearly flat, the rolling resistance increases. Normally, replacing a set of tires every three years can reduce fuel consumption. These small daily adjustments make a real difference.
