[jegund]

Never had that happen yet, but makes sense. Good to know if I ever have to pull forward to another pump. Thanks

 

[Skip]

Good information, Thanks

 

[vulpes]

Whoah, not very safe there...

First off, it's a really BAD idea to drive around with your gas cap off and flap open. If the fumes get anywhere near someone who is smoking for example your car could catch on fire. Fuel could spill out and you are also contaminating the air with unburned gas fumes. I read somewhere that one of the reasons why newer cars detect if there's a leak in the gas tank is that lots of people drive around with missing gas caps resulting overall in more air pollution due to gas evaporating. It also goes bad faster too when exposed to air like that.

If you've ever read the manual it says that you must fuel up the Volt after hitting the gas release within about 30 minutes or so. This means that there is an internal valve that shuts closed to help prevent gas fumes from escaping so that's probably your explanation there.

 

[ewiggins]

First off, it's a really BAD idea to drive around with your gas cap off and flap open. If the fumes get anywhere near someone who is smoking for example your car could catch on fire. Fuel could spill out and you are also contaminating the air with unburned gas fumes. I read somewhere that one of the reasons why newer cars detect if there's a leak in the gas tank is that lots of people drive around with missing gas caps resulting overall in more air pollution due to gas evaporating. It also goes bad faster too when exposed to air like that.

If you've ever read the manual it says that you must fuel up the Volt after hitting the gas release within about 30 minutes or so. This means that there is an internal valve that shuts closed to help prevent gas fumes from escaping so that's probably your explanation there.

Yeah I know I should have put it back on, but I was just going next door and it was early in the morning. The value must also close when you turn the car on because it only took me less than 1 minute to drive next door. As someone stated earlier, it is also good to know in case you pull up to a pump and the pump is not working and you need to pull up to the next pump.

 

[Noel Park]

My memory probably is not what it used to be, not that it was ever that good, LOL. I put gas in my Volt so seldom that I almost have to get the owners manual out and figure out how to do it each time, hahaha.

 

[Fulgerite]

Yes... The Volt's fuel system is pressurized to comply with EPA regulations. (Just like many other new ICE cars today.) The pressure is also held by a secondary flap valve down the filler pipe somewhere. When you start the car the air pump will re-pressurize the fuel system (gas cap or not.) Once the flap valve is closed and the tank is pressurized it's impossible to add fuel. (As you discovered.) Pressing the pressure release button in the driver's door will depressurize the system and let you put gas in the car.

Frankly... I think opening the fuel door should also depressurize the tank.