The first gasoline pump certainly ... near the shut-off valve in the nozzle. When you squeeze the handle and precious gas starts to flow up through the spout, this creates a vacuum in that tube ...

So, here's how the shut-off sensor ... and that vacuum sucks down the cutoff valve, stopping the flow of fuel. What this all means is that if you're filling your tank and the pump keeps cutting ...

Q: When I fill my gas tank, how does the nozzle know when to shut off when the tank is ... mechanically closing the flow valve. It’s similar to your vacuum cleaner. If there was a large hole ...

It could also be a vent valve failure, where the car's system for venting fumes is affected and causes air pressure to build up, which can prompt the pump to shut off. While it’s certainly a ...

If you drive a gas-powered car, you know the drill when it’s time to refuel: You pull up to the pump, scan your ... depend on a delicate vacuum system to shut off, and then the tank is full.

I have had issues with another vehicle at this pump, so I hang it up and go to another ... The last – and simplest – repair is the EVAP vent-valve solenoid and vent valve located underneath ...

br> -- Q U E S T I O N: When I’m filling up my car at the gas station, how does the pump sense that the tank is full and then automatically shut itself off? — Kate S. A N S W E R: After ...