I refueled my mother car the other day and heard the familiar sound of the pressure relieveing from the fuel tank when I removed the fuel cap. But yet I can't recall the last time I head my fuel cap do the same. Are out cars supposed to make that suction sound? Are all cars supposed to make that suction sound?


Juker008

 

My car made it twice since I had it. I wondered whether it was normal or not too.

 

yeah, it's normal. The owner's manual even mentions this in the "filling the fuel tank" section. The sound is probably from the "refueling vapor recovery system" that's mentioned in the manual.

 

mine never makes the sound

 

Well, the manual does say you "may hear" the sound so I guess it's normal not to hear it also.

 

I don't get it, I even recall refueling a Taurus (company vehicle) and hearing that sound. And I also recall something that if the sound is not present there could be a problem with the vapor recovery system.


Juker008

 

My car always makes that sound especially when the fuel is really low. My moms Q makes it as well as my sisters volvo so i think its normal

 

Mine makes that sound just about every time I refuel!

 

Same here.

 

Do you run it to E? I hear it sometimes. I also hear it on my Explorer.

 

Mine does it but only when I'm below half a tank of fuel.

 

You won't hear it as much in colder weather or when the fuel level is high. The air inside the fuel tank will expand in warmer weather (heat warms the air), causing the pressure to build up in the tank. The lower the fuel level, the more air in the tank, so the more pressure builds up. Low fuel on warm days will cause the most pressure release when opening the tank. If you don't let the tank get much below half, you won't notice it as much (or at all).

 

I've got some miles on the car and I do have a tendency to run the car to E. And yea I live in a warm climate.


Juker008

 

i hear it when it gets low and when its warm!