What Causes High Fuel Consumption and Poor Acceleration in Cars?
2 Answers
The reasons for high fuel consumption and poor acceleration in cars are as follows: 1. Excessive carbon deposits: When there is too much carbon buildup inside the engine, the car's ignition system may become misaligned, reducing the engine's intake efficiency and ultimately leading to a decrease in engine power. The car may exhibit symptoms such as weak idling and, in severe cases, shaking. 2. Poor-quality gasoline: Fuel system malfunctions can occur if the car is filled with substandard gasoline, which reduces engine power. If the car's fuel grade is 95, then it must be filled with 95-grade gasoline, as this is the minimum fuel standard for the car. Another possible cause is a blocked fuel tank cap vent, which restricts fuel supply, leading to an overly lean air-fuel mixture in the engine and reduced engine efficiency. 3. Insufficient oil levels: Low engine oil levels or insufficient engine coolant can increase the engine's load, impair heat dissipation, not only reducing engine power but also increasing the car's fuel consumption.
I've been driving for over a decade and have seen plenty of cases of high fuel consumption and poor acceleration. Usually it's due to aging spark plugs or faulty ignition coils - when ignition fails, gasoline doesn't burn properly, naturally leading to wasted fuel and lack of power. A dirty air filter is also troublesome, as insufficient airflow makes the engine struggle for breath, resulting in weak acceleration. Low tire pressure increases fuel consumption significantly due to greater rolling resistance, making speed buildup more difficult. For older vehicles, carbon buildup clogging the intake valves is common - cleaning them shows noticeable improvement. I recommend checking tire pressure every few months and maintaining it at the recommended value. Simply take out the air filter occasionally to inspect - replace it when dirty, don't wait until complete failure to fix. These small habits can save quite a bit on fuel costs.
