Why Does Fuel Consumption Increase After Replacing the Gasoline Filter?
2 Answers
After replacing the gasoline filter, a surge in fuel consumption may be related to engine oil maintenance. Relevant information is as follows: The reasons for increased fuel consumption after replacing the gasoline filter are: Overfilling engine oil during maintenance can lead to higher fuel consumption; if other maintenance items are not performed adequately or maintenance is insufficient, replacing the fuel filter may result in increased fuel pressure. The function of the gasoline filter: To filter out water and impurities from gasoline. When the engine is running, fuel flows through the inlet pipe into the sediment bowl of the filter under the action of the fuel pump. Due to the increased volume and reduced flow velocity, heavier water and impurity particles settle at the bottom of the bowl, while lighter impurities flow with the fuel toward the filter element. Clean fuel permeates through the micropores of the filter element into its interior and then exits through the fuel pipe.
Oh man, I ran into this exact situation last week! After helping my neighbor Old Zhang replace the fuel filter on his old Jetta, the fuel consumption suddenly jumped by 1 liter. Turns out the new filter had higher filtration precision than the OEM part, forcing the fuel pump to work harder. Worse yet, we didn't notice a cracked fuel line clip during installation, causing air leaks that messed up the air-fuel ratio. Pop the hood and check for gasoline smell when idling, then feel around the filter connections for leaks. Also, when old cars get new filters, the suddenly unobstructed injectors may temporarily increase fuel consumption until the ECU adapts - give it 200 km of driving before reassessing.
