Some pressure in fuel tank OK? (1 Viewer)

[thegreatgazoo]

I noticed some pressure in my fuel tank recently. Whenever I open the fuel cap, there's some hissing sound for about 2 to 3 seconds. Nothing seems serious - no gas in the face, no odor either. I drive the LC mostly in the Denver area, about 5500 feet, and it's been cold lately. Is that normal or is it a sign of something going wrong (charcoal canister or vapor line)?

Also it seemed to begin after I replaced the fuel filter but I'm not sure.

 

[ToHiHy]

Completely normal. All good.

 

[arcteryx]

Very dangerous and could cause immediate combustion.

Seriously, no big deal. It is more prevalent when you run your tank too low. It's just pressure being released.

 

[e9999]

the cap better holds pressure or you may not pass smog tests in some places.
Some say that the pressure does indicate a problem with the charcoal canister system, however.
Several trucks I've seen do have the extra pressure though.

 

[zapata]

Had the same issue.....changed charcoal canister and no more problem

 

[thegreatgazoo]

Thanks all. I'll stop worrying but keep watching!