Why does the fuel nozzle keep shutting off when there's air in the fuel tank?

1 Answers
JoyFitz
07/30/25 2:35am
There are three main reasons why the fuel nozzle keeps shutting off during refueling: 1. Hot weather causes high air pressure inside the fuel tank, making fuel prone to splashing out during refueling, which triggers the automatic shut-off of the nozzle. 2. Relatively fast refueling speed causes fuel droplets to splash, leading to nozzle shut-off. 3. Overly twisted structure of the fuel tank's pipe can easily cause fuel spray and nozzle shut-off. Additional information: 1. Nozzle shut-off refers to the automatic stopping action of the fuel nozzle when a vehicle is nearly full during refueling. The nozzle tip is equipped with a sensor that automatically closes the nozzle when it contacts the fuel surface, creating this "shut-off" action. 2. "Shut-off" usually occurs when the tank is nearly full. Another situation occurs during hot weather when fuel in the tank splashes due to pressure (air lock inside the tank), which can also cause "shut-off".
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