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Brad777's avatar
Brad777
Explorer
Apr 15, 2014

Gasoline Evaporation of 3/4 gallon per week ???????

I have a 1995 Bounder with a 75 gal. gas tank. I am loosing about 3/4 gal. of fuel every week because of what I think is evaporation. I have looked for leaks and find none. I followed the vent tube fr...
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pugslyyy's avatar
pugslyyy
Explorer
Apr 15, 2014
timmac wrote:
pugslyyy wrote:
A modern fuel system is sealed, so if it is evaporating there is a problem with the fuel system!


No the fuel systems are not sealed that tight, they do have vent lines, they are better designed than the ones 30 years ago but they still do evaporate some.


Yes, evaporation occurs but modern vehicles are not allowed to vent it to the atmosphere. That's why a loose gas cap will through a check engine light these days!

Evaporative Emission Control System

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