What are the reasons for a sudden significant increase in fuel consumption?
2 Answers
The following are the reasons for a sudden significant increase in fuel consumption: 1. Faulty coolant temperature sensor: Its resistance value at different temperatures should meet the standard. If the resistance is too high, the computer may mistakenly think the engine is in a cold state, thus performing a cold-start enrichment control, which increases fuel consumption. 2. Faulty air flow meter: Errors in the air flow meter or intake manifold pressure sensor can directly affect the fuel injection quantity. 3. Faulty throttle position sensor: When the throttle is at small to medium openings, the full-load switch contact should be open. If the full-load switch contact remains closed or closes too early, the computer may continuously or prematurely perform full-load enrichment, thereby increasing fuel consumption. 4. Excessive fuel pressure: The fuel pressure at idle should meet the specified value. As the throttle opens, the fuel pressure should gradually increase, and the fuel pressure at full throttle should be about 50kPa higher than at idle.
My car's fuel consumption has skyrocketed recently, and it feels like my wallet is bleeding. Upon reflection, it might be due to poor driving habits, such as frequently accelerating and braking abruptly in congested traffic, which significantly increases engine load and burns fuel faster. Additionally, not checking tire pressure in time when it's too low increases friction while driving, naturally leading to higher fuel consumption. In winter, the cold weather requires longer warm-up times, consuming more fuel. If the air conditioning is cranked up, especially in summer, the compressor's operation adds extra load. I recommend driving smoothly without rushing, checking tire pressure regularly, and reducing prolonged warm-up times in winter to save a considerable amount of money and be more eco-friendly. Also, check if you've forgotten to close the sunroof or windows, as increased wind resistance can also lead to higher fuel consumption. In short, paying attention to these daily details can help control fuel consumption.
