ever since I owned my car, i NEVER heard a a vacuum release type noise come from my car when opening my gas cap..
i did it on my girlfriend's accord and it was loud as hell?
is there anything i should check on mine?
by the way its a 2000 ex civic

 

Mine always has a hiss when i open the gas cap.
It's just letting the pressure built up from driving out. That's why on the cap it says to open up slowly.

 

yeah dude its cool...don't worry...and i'm sure you already know this but you misspelled hear in your topic title...its hear not here...

ps. not trying to be a dick

 

i think its positive pressure not vacume, when the gas heats up it gets a bit more volume

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xerox445 &raquo;</TD></TR><TR><TD CLASS="quote">i think its positive pressure not vacume, when the gas heats up it gets a bit more volume</TD></TR></TABLE>

I 2nd that. It's pressure and its perfectly normal

 

I don't think people are really reading. Mine does it as well though.

Might want to make sure your gas cap is sealing 100%.

Sometimes mine does it, sometimes it doesnt.

 

yeah thanks for the edit man lol
i know it's hear not here (what made me write that lol)

anyways mine is NOT hissing when i open it up and thats the issue.

 

it's just pressure in the gas tank, I have a new gas cap on mine, I left it at a station where it was prepay and there was no signs for that and I was pissed and forgot to put it back on when I went to get my change. Mine does it especially when it's extremely low and more likely to happen when doing a lot of driving. It's normal, also make sure you click it at least 3 times, says right on the cap. I heard you shouldn't let your gas get too low cause it's hard on the fuel pump.

 

If you guys will notice...

It only does it when your on ''Empty''

I think it has something to do with air and pressure building up in the tank from where your low on gas and when you open the cap...PSSHHH it releases it

 

its a pressure not a vacuum.

on a side not, a vacuum will never be released, rather it will equalize with the outside atmosphere. Quick physics note for ya


Rob

 

I understand, Ricey

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ricey McRicerton &raquo;</TD></TR><TR><TD CLASS="quote">Might want to make sure your gas cap is sealing 100%.</TD></TR></TABLE>

At least 3 clicks of the cap when you put it back on.

 

dont worry, you probly just have a HKS super sequential gas cap