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Discussion Starter · #1 ·
On a 2nd gen taurus on the passager side under the car, there is 3 plastic tubes/hoses which look likes to me to be fuel lines. There is 2 big a one smaller one, whats the small one(smells like gas)? I noticed today that it had been cut.
 

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Tank vent tube that goes to the charcoal cannister? Follow it up front and see where it goes.
 

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Discussion Starter · #4 ·
Does it need to be sealed or will it make a difference in my mpg's if i leave it alone and open to the world
 

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IF it is the tank vent line to charcoal cannister, leaving it disconnected MIGHT result is some slight gas smell around the car under some conditions, but it wont have any effect on gas mileage, how it runs, etc. If the line coming from the tank gets completely plugged with road debris, the tank wont have any place to vent excess pressure or suck in air to replace the volume of fuel used while driving, which could put the tank under vacuum.
 
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