Help --- I got a weird question about my gas tank.

[M1Accord]

If we look at a sink, it has 2 holes to drain the water/fluid. The first is the standard hole leading straight to the pipe and out to septic tank or whatever. The second hole is high up near the counter top surface to prevent overflow. Do you have the picture.

Now transfer that thought over to gas tank pump area. There is the main hole where the nozzle goes in and there is a extra hole outside that, acting somewhat like an overfill hole. Now, if gas or fluid gets into to the second hole, does it goes into the gas tank or down the road? The reason I ask is that I attempted to put in some fuel injector cleaner and the bottle tip is slightly bigger than the gas hole (dump bottle design I guess). So there is a good chance some of the cleaner fluid went into the secondary hole on the gas filler area. I need to know if it gas into the tank or down the road.

Thanks.

 

[M1Accord]

no one knows the answer????

 

[Donald]

Both hoses go to the tank.

 

[M1Accord]

thanks [censored]. i thought i just wasted some money by spilling it into that hose. they should standardize all bottle tip to be usuable for gas tank filler hole w/out the use of funnel.

thanks bro.

 

[NYEngineer]

That second hole is a vent. the air you're displacing when you fill the tank has to exit somewhere.

 

[mechtech2]

ditto NTY
Modern cars have sealed fuel systems, with various valving to purge them. It is not going out the back of the car - it ends up back in the tank.

 

[Tosh]

possibly after a brief trip to the evaporative canister