hey everyone , i have a 94 camry v6 le and my gas tank builds up pressure. im not familiar with fuel systems yet so i can use some advice. hope to hear from someone soon , thanks.

 

Pressure as in air rushes out?

The tank is not vented to outside. Any fuel vapors are supposed to go to a charcoal canister for storage then routed into the engine for burning.

 

And I believe that a CEL would be on for that problem. Is this really a problem? Isn't the gas expanding anyway? Perhaps it needs a new, correct gas cap. Seems to me when I was a pump jockey in the 70's some cars did this anyways.

 

Had a few times when the unscrewing the cap resulted in air going in or out enough to notice. Maybe extremes in temp.

If no light or other issues would not be concerned yet. The tank has a vent system to prevent pressure extremes building up.