Is it normal for the fuel tank to buzz after the Lavida is turned off?
3 Answers
This is the sound of the fuel pump working, which is a normal phenomenon. Fuel pump: The fuel pump is a lightweight and compact pump, proposing a fuel pump and equipment with a housing made of aluminum-containing material. Inside this housing is a movable molded part, where this movable molded part is at least partially made of a sinterable, iron-based alloy material containing at least one austenite, and where the molded part made of a sinterable material has a thermal expansion coefficient that is at least 60% of the housing's thermal expansion coefficient. Vehicle pre-fuel supply: To ensure that the engine can ignite immediately upon starting, the vehicle must first store oil pressure, commonly known as pre-fuel supply for 3 seconds. The fuel pump in the tank continuously supplies fuel to the engine, hence the constant sound.
Regarding the buzzing sound from the fuel tank after the Lavida is turned off, I think it's a common phenomenon. I've encountered it when driving similar models. The buzzing sound after turning off the engine is actually normal. Many modern cars, including the Lavida, are designed to keep the fuel pump running for a few seconds to half a minute after shutdown to balance fuel tank pressure or handle gasoline vapor. If it's a brief and uniform buzzing sound, there's nothing to worry about. However, if the sound is too harsh or lasts more than a minute, there might be an issue, such as an aging fuel pump or a clogged carbon canister, in which case you should visit a repair shop as soon as possible. Pay attention to the duration of the sound: normally it shouldn't exceed 30 seconds. Seasonal changes in fuel levels can also affect it, for example, the sound may be more noticeable when the tank is half full. It's advisable to develop the habit of listening briefly after turning off the engine to detect potential issues early and avoid costly repairs later.
The buzzing sound from the fuel tank after the Lavelle is turned off is generally normal. I've discussed this on car forums, and many owners have reported similar situations. The reason is that modern fuel system designs allow the pump to briefly operate after shutdown to cool or purge the vapor system. The sound should be soft and quickly fade away. However, be alert to abnormal situations: if the sound lasts too long or has unusual noises, it could indicate a worn fuel pump or a failed charcoal canister, which may cause starting difficulties or even safety hazards. I recommend conducting a simple test yourself: note the time when the sound disappears after parking. Normally, it should stop within 10 seconds; if it exceeds this or has a trembling sound, have a technician check the circuit with tools. Don't ignore it, as fuel system issues can affect the car's overall performance and fuel consumption.
