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Discussion summary
YOUR RESEARCHHelp with Fuel Vapor Smell
Reported repair
Replace gas tank and filler neck and the issue was
Reported resolution
1
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0
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1
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Reported fix
Replaced the gas tank and filler neck and the issue was solved.
Leading evidence: 'Replace gas tank and filler neck and the issue was' (1 discussions report resolution; 0 report an unsuccessful attempt). Across 1 matching discussions, The most frequently discussed action is 'Replace gas tank and filler neck and the issue was' (1 discussions). For that action, 1 discussions report a resolution and 0 report an unsuccessful attempt. The most frequently reported fix is 'Replace gas tank and filler neck and the issue was', supported by resolution reports in 1 discussions. These are forum reports and suggestions, not a confirmed diagnosis.
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Performed · outcome unconfirmed
Checked a lot of the usual things you mentioned but ended up being a leak from a deteriorated seal between the filler neck and the tank.
Fill car up the other day and accidentally overfilled it
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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Performed · outcome unconfirmed · Original poster
I filled the car up the other day and accidentally overfilled it.
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Suggestion
FWIW, I didn�t have any filling issues, just a smell when more than 3/4 full.
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Suggestion
Does the fuel smell change depending on how full the tank is?
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5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261026T103553Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I filled the car up the other day and accidentally overfilled it. My gauge never reads full, always just slightly under full, and I was messing around trying to get it full but it overflowed. Seems to always fill about 1 gallon short of what I think it should.
No big deal, I drive the car and everything was fine. Went on a mountain drive the next day for some lunch and came home. Came back out to the garage and had a pretty strong fuel smell. To me, smelled like It was strongest from the engine bay.
The smell cleared out, I drove the car again, same issue. Parked outside until I had time to get it in the air today.
No CEL, car runs great. I pulled the fender liner to look at the fuel filler, gas tank, etc and all looks good with no evidence of a leak. Pulled the hat off in the frunk and everything looks good, no obvious leak. Inspected the fuel lines and peaked at the fuel injectors, all looks good. Pulled the plastic splash trays off underneath the fuel tank and there are no obvious signs of a leak.
Pulled the charcoal canister and I have no idea how to tell if this thing is bad. Google says it should weigh around 3.45 lbs new, mine weighs almost 4 lbs. I suspect that isn�t good.
I pulled the evap purge valve in the engine bay and checked it. Seems it is closed (cannot blow air through it from the inlet) and it seems to operate when I apply 12v (I hear the valve click). I�m assuming that�s good.
Anyways, would love to hear some opinions. Since I�ve already pulled the canister, I might just replace it anyways.
Interesting...I wonder if there's a path for liquid fuel to end up in the canister upon fuel overfill?
Seems like there is an extra 8 oz. or so in the charcoal canister.
Does the fuel smell change depending on how full the tank is? I ask because I had something similar where if the tank was full our garage would smell of fuel after a few hours of being parked. If less than 3/4, the smell wasn’t there. Checked a lot of the usual things you mentioned but ended up being a leak from a deteriorated seal between the filler neck and the tank. Replaced the gas tank and filler neck and the issue was solved.
When full and parked, I felt like the smell was coming from around the fuel filler and not the engine as you mention, so may be different.
Unknown at the moment, I stopped driving it until I could get it in the air and verify no fuel leaks existed.
However, the tank didn�t seem to fill any more or less than usual and I haven�t had this issue before.
I went ahead and ordered the vapor canister since it seems like it should be replaced anyway, and the purge valve was only $50 so I ordered that too. I�ll install tomorrow and drive a little this weekend.
Hopefully that�s it as obviously is better than replacing a gas tank 🥴
FWIW, I didn�t have any filling issues, just a smell when more than 3/4 full.
Let us know how it goes.
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