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if you are talking about on the fuel gauge in the car, there is a float(part of the pump) that rises and the sensor registers it on the dashboard.
But if you are refering at the gas sation, then there is a small hole in the nozzel which works based on the amount or air in the tank
What else can I help you with?
Can a gas tank overflow if it is not full?
A gas tank can indeed overflow if it is not full. A gas tank can overflow if the pressure inside of it is too high.
What makes gas gauge on a 2004 Chevy Malibu to bounce all over while driving when you know the gas tank is full?
The sending unit in the gas tank is bad.
What does it mean when your Gas gadge is on F?
Your gas tank is Full 'you have gas' full
How many miles can you get from full tank of gas in a Cadillac Fleetwod?
How many miles on a full tank of gas for 1997 Chevy Malibu
How much methyl hydrate do you use for a tank of gas?
You can put about a pint in a full tank of gas.
Why would our 1986 cadillac deville gas gauge show E when we know its full?
from what i hear this can happen when someone tries to syphon your gas tank it breaks the little meter inside your tank
Is it better to keep your gas tank at half or a full tank?
For long term storage, keep it full.
Do you get more mileage on a full tank of gas?
No
How many miles does a full tank of gas get in a 2001 Alero car?
How many miles does a full tank of gas get in a 2001 Alero Oldsmobile car
How do you empty a full gas tank on a 95 Buick LeSabre?
You need to siphon it out. You'll also need several gas cans if the tank is full.
How many miles can a 1995 astro van get on a full tank of gas?
The 1995 Astro van on a full tank of gas can travel for about 500 miles.
Have a 1999 dodge intrepid- with a full tank of gas the gas gauge is going from full to empty and back up to full what could be causing it to do that?
It may be a problem with the sensor, which is located in the gas tank itself. If this is the case, the gas tank will have to be removed and exchanged for a tank with a working sensor. Needless to say, this is a job for a mechanic with a lift available.
