Quote:
|
Originally Posted by Steve #1
After giving it some thought, this explanation doesnt even work for me. In order for the running engine to create negative pressure, the engine would need to be consuming fuel faster then the pump can pump it in. Even the most thirsty engine isn't going to be using a noticeable amount of fuel at idle.
|
...That and the fact that the nozzle is in air and not fluid until the tank is full. There's no way you could pull enough vacuum down the fuel filler to trip the nozzle at engine idle.
http://www.straightdope.com/classics/a1_263.html