Fuel Smell/Gas Venting Help!!

[Nelsontacoma]

I have a 2003 4Runner Limited V8 135k. For a while my wife has complained about a gas smell after driving for longer distances. I've duplicated it a few times but could never quite locate the source. I replaced the purge valve and gas cap as I know it's a common failure on all vehicles. Still does it. So this weekend we went camping and took our 4 bikes and pop-up trailer up the mountain to approx 8000ft and while backing the trailer into position I noticed gas fumes coming from the fuel door.

So after my long story I guess my question is what seems to be the common evap system failures on these? Filler neck? Vapor canister? Canister close valve? My gas mileage is normal 14-16mpg and no fuel leaks noted on the driveway or gas tank (only transfer case leak noticed.....).

Has anyone ever experienced this same/similar issue?

 

[SLAMEL]

Just had this happen to me too. I am wondering the same thing

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[T4RNightHawk]

That happened to me short term in moab. For me it was that the rock is so hot it vaporizes the gas which then goes into the charcoal canister or something and it just got too full and vented fumes.