Why does the fuel nozzle keep shutting off?

[LeLeila]

The reasons for the fuel nozzle shutting off are: possibly due to blockage in the fuel line or poor fuel flow; the vent pipe next to the fuel filler neck being blocked or deformed; high air pressure inside the fuel tank caused by hot weather, making fuel prone to splashing out during refueling; relatively fast refueling speed causing fuel splashing that triggers the nozzle to shut off; or overly twisted structure of the fuel tank pipe. The nozzle shutting off refers to the automatic stopping action of the fuel nozzle when the vehicle is nearly full at the gas station. The fuel nozzle tip is equipped with a sensor that automatically shuts off the nozzle once it comes into contact with the fuel surface. This shutting-off action does not affect the fuel quantity.

[EloiseFitz]

Experiencing fuel pump nozzle shut-offs while refueling is quite common. I believe this is mostly due to issues with the fuel tank ventilation system. A clogged vent can cause excessive pressure inside the tank, triggering the nozzle's automatic shut-off as a safety measure. Additionally, an overly sensitive nozzle or fast refueling speed might also be the cause. From my experience, the solution is to refuel more slowly and patiently; sometimes switching gas stations or gently shaking the fuel hose can help. If this occurs frequently, it's necessary to check whether the fuel tank cap valve is functioning properly, and visit a repair shop to clean the vent if needed. Safety reminder: Never smoke or use open flames while refueling to prevent accidents. Regular maintenance to keep the vent clear can help avoid such minor issues.

[VonBeau]

I guess the fuel pump nozzle shutting off is caused by vacuum inside the fuel tank, where air pressure imbalance leads to frequent nozzle closures. Common causes include valve malfunction, dirt buildup blockage, or incorrect nozzle positioning. The solution is quite simple - first try reducing fueling speed or adjusting the nozzle grip; if that doesn't work, check whether the fuel cap is loose or damaged. New cars may experience automatic nozzle shutdown due to sensitive sensors, while older vehicles suffer from insufficient maintenance. As an experienced car owner, I always remind people not to overlook this minor issue - regular cleaning of fuel tank components can prevent problems. When it happens, stay calm and handle it patiently.

[MacDelaney]

The frequent auto-shutoff during refueling is really annoying, with constant stops and starts. I think the cause might be high tank pressure or poor ventilation, triggering the pump's automatic shutoff. The solution is simple: choose the slow mode when refueling, don't insert the nozzle too deep; or try changing positions and wiggling the fuel hose. It's not a major malfunction, but if it persists, check the fuel cap. Safety first—don't risk continuing to fill.