Excessive preasure in gas tank

[Dominasian]

Ever since i put an ECM link and did a small correction to an idle, my gas tank started to have an excessive amounts of pressure, past 2 times when i go and refil my gas tank, when i open the cap, its a hissing noise like other cars would do, but mine just has too much of it.
What could be a problem ? is it really because of link ? or the charcoal canister is going out ?

 

[airmail96]

Doesn't the gas tank have a vent built into the top of it?

 

[FIBA M - EC17PSE]

It will hiss and only does it more when you run the tank low! In my daily if I run it to 1/4 of a tank low then it will hiss for about 4 seconds! Its perfectly normal and I would not worry, you can always check your vent but I doubt its blocked.

I dont know if higher fuel pressure of blocking Off the evap canister does anything to this so I cant help there sorry

 

[dsmtun3r98gst]

are you sure?? in the eight years of having my DSM I don't think I've ever heard a hissing sound at all when I go put gas.

you might have a vent blocked off.

 

[FIBA M - EC17PSE]

And in mine it does have a small hiss but thats about 1 second hiss so but I dont go below 1/2 tank

 

[Zufelt]

Mine also has a hiss, which is more audible when the tank is lower on gas. Fill it up, drive a few miles fill up again and see what happens

 

[Dominasian]

Thats a good point, i usually have a tank below 1/2 filled. Guess i gotta start refueling more often
If your car is hissing for about 4 seconds, well then mine will his for 4 seconds while i am untwisting the cap, and then just one BIG *** hiss for another 4

 

[FIBA M - EC17PSE]

Thats a good point, i usually have a tank below 1/2 filled. Guess i gotta start refueling more often
If your car is hissing for about 4 seconds, well then mine will his for 4 seconds while i am untwisting the cap, and then just one BIG *** hiss for another 4

You dont need to fill up to get rid of it as its only vapor pressure and nothing to worry about, I dont like to run ot low on gas as im picky and dont want crap being sucked up from the tank by chance but people run fine on low gas levels so dont worry your self over this noise