Why is the car's instantaneous fuel consumption suddenly high?
3 Answers
Here are the reasons why a car suddenly consumes a lot of fuel: 1. Excessive warm-up time in the morning or driving too short a distance. Abnormal tire pressure or switching to oversized tires. 2. Not planning the route well, driving on congested roads, or frequently changing lanes. 3. Not regularly cleaning the car. Keeping the engine idling for long periods without turning it off or frequent ignition. 4. Accelerating violently or braking frequently while driving. Unnecessary load added to the vehicle. 5. Engine oil not filled according to the specified grade. Driving at high speeds in low gears or low speeds in high gears. 6. Opening all windows in summer or using the air conditioning during traffic jams. Additional advice: It is recommended to plan the driving route in advance, pay attention to local traffic information and road conditions to avoid congested sections.
Having driven for so many years, I've encountered numerous instances of sudden increases in fuel consumption. Typically, this happens when you press the accelerator too hard—for example, pushing the throttle aggressively during acceleration significantly increases engine load and burns more fuel. It's especially common in city traffic with frequent stops and starts; every time you accelerate from a stop, it happens. When it's hot and the air conditioning is on, the compressor adds to the engine's workload, causing fuel consumption to spike. Low tire pressure increases rolling resistance, making the car work harder and burn more fuel. The solution is to drive smoothly, accelerate gradually, and develop good habits. Regular vehicle maintenance, such as cleaning the air filter to ensure unobstructed airflow, can also help improve the situation.
I often encounter high instantaneous fuel consumption when repairing cars. Common causes include aging spark plugs leading to poor ignition and incomplete fuel combustion, resulting in waste. Additionally, carbon buildup in the throttle body can cause improper opening and inaccurate fuel regulation. Clogged or dirty fuel injectors are also culprits, as reduced injection efficiency increases instantaneous fuel consumption. Insufficient tire pressure increases friction resistance, leading to extra fuel consumption, so regular checks are necessary. It is recommended that car owners use an OBD diagnostic tool to check for fault codes, enabling early detection and timely repairs without delay.
