How does eg civic (efi) release fuel pressure in summer

[connorling]

Hi there,
I notice a noise come from under the fuel tank what sound like a gas leak during hot days.

I open the refill cap and lot of gas rush out.

And the gas leak noise stop.

I suspect the fuel got really hot and pressure build up.

Is this gas leak noise normal?

[eren]

happens to my ek aswell , when i open the fuel cap after driving it sounds like a bov going tsss

[connorling]

But I can gear gas leaking noise under the fuel tank before I release the tank pressure at the filler cap

[eren]

But I can gear gas leaking noise under the fuel tank before I release the tank pressure at the filler cap
can you see the leaks ? , losing fuel? loss of performance ?

[connorling]

can you see the leaks ? , losing fuel? loss of performance ?
Nope. But scare the pressure build up too much n blow a fuel line etc

[stndrd]

Sounds like the charcoal canister purging

[SU-WOOP]

check the purge line is connected to the top of the throttle body and not blocked and check the actuator vacuum from the back of the I/M is connected