What Causes a Sudden Increase in Vehicle Fuel Consumption?

[OKiara]

Engine carbon deposits, spark plug failure, and sensor malfunctions can cause a sudden increase in vehicle fuel consumption. Engine Carbon Deposits: During prolonged vehicle operation, gasoline combustion inevitably produces carbon deposits and sludge. If these deposits and sludge are not cleaned promptly, they can lead to increased fuel consumption. Spark Plug Failure: The role of a car's spark plug is to generate an electric spark with high voltage to ignite the air-fuel mixture. If the spark plug is damaged, the ignition energy decreases, resulting in uneven combustion of the mixture, which slows down acceleration and increases fuel consumption. Sensor Malfunction: Sensor malfunctions are also a major cause of increased fuel consumption. For example, when the coolant temperature sensor fails, the engine may mistakenly assume the vehicle is in a cold state, continuously sending signals to inject more fuel, thereby increasing fuel consumption. Solutions for Sudden Increase in Fuel Consumption: Engine carbon deposits require timely cleaning. Spark plug failure necessitates prompt inspection and replacement. Sensor malfunctions should be repaired or replaced as soon as possible.