Gas Smell In Cabin in Cold Weather

Discussion in 'Gen 2 Prius Main Forum' started by Manuel Orellana, Dec 26, 2020.

  1. Manuel Orellana

    Manuel Orellana Junior Member

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    Hi Everyone,

    I wanted to share this information in case someone else has this issue. I was getting gas smell as soon as the weather turned cold. The smell would come and go and come and go and then disappear completely when the car was driven for a while.

    I read somewhere that it could be the o-rings on the fuel injectors and indeed it was, the repair was a bit pricey (I paid 170 in labour) I provided my own parts that I bought from Rock Auto bought new o-rings and spark plugs and had both replaced at the same time while the guy was there. The spark plugs were ok but worn and was told it was actually a good idea to replace them so there's that, and after the guys removed the injectors, cleaned them and replaced the o-rings, no more gas smell.

    Just thought I'd share this in case it helps someone, this is a great site and people are really helpful, it's helped me I'm hoping this can help someone else.
     
  2. PriusCamper

    PriusCamper Senior Member

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    There was another post on here, or maybe it was a FB group discussion in recent days, that had this symptom and everyone was focused on air screwing up the fluid in the cooling system. But this might be something else to consider. I suspect posting your comment there would be helpful, of course I can't find the link now so...
     
  3. Manuel Orellana

    Manuel Orellana Junior Member

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    This is the thread that led me to replacing my o-rings

    Strong smell of petrol (gas) | PriusChat

    I've never visited the facebook site yet, but I'll keep an eye out for it, again, if my experience can help someone else, that's what it's all about.
     
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  4. Manuel Orellana

    Manuel Orellana Junior Member

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    This is interesting. Last night I took a long drive, approximately 2 hours, after non-stop driving for approximately 40 minutes we came to a stop and once again sensed the gas smell. Nothing I could do about it there since I was literally in the middle of nowhere, kept driving another 20 minutes non-stop (gas smell is gone) came to another stop and the smell resurfaced in the cabin momentarily, kept driving, again, another 20 minutes or so same thing. I read somewhere that it could be something as silly as the gasket on the oil cap, just wondering if anyone has any suggestions, it seems like when I stop pressure is released and that smell momentarily comes out, doesn't happen when I drive. Any other suggestions?
     
  5. PriusCamper

    PriusCamper Senior Member

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    Cleaning & inspecting every nook & cranny is always a good practice to find the problem. Also as mentioned earlier a bunch of people on a Prius FB group recently mostly agreed that smell of gas in the cabin was due to air in the coolant/heater system and I've never heard of that and thought it odd that so many would agree with that.
     
  6. drone13

    drone13 Member

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    It sounds like you might want to take a look at the complete evap system first. Get a smoke check if you can. I think while the engine is running the evap system will be purging into the engine, so no smell detected, and when it is shut off any leak will create the smell. Just a thought.
     
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  7. Manuel Orellana

    Manuel Orellana Junior Member

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    Thank you @drone13 and @PriusCamper appreciate the suggestion. I took the car to my mechanic on Friday and they’re baffled as there’s no serious smell of gas when you open the hood, my mechanic, silly enough took out the cabin filter it was a bit dirty he took it and shook it out, I also I did the oil cap and put it back on, it was on tight but I put it back on there and tightened up again. Since then I have purposely gone out since it’s been cold around -5c or lower and I haven’t smelled a damn thing which is crazy, however on that note since it’s time anyway I ordered a new cabin cabin and air filter and those will come in this week. I’ll keep everyone posted. The evap is a good idea although I haven’t seen any check engine lights come on. The mechanics also mentioned that the vehicle is pristine underneath not a speck of rust hence the reason why I’m investing time and money since I love the car and it’s a great ride. Let’s hope this can be found as always, thank you all for your input it’s all helpful.
     
  8. Mendel Leisk

    Mendel Leisk Underfoot

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    With TO winters, that's amazing; maybe the quality of rustproofing was higher.

    Our 3rd gen on the west coast had a dismaying amount of surface rust, on all the suspension components (especially at welds), screws, nuts and bolts, after 3 or 4 years in when I first started checking. I cleaned and painted everything I could reach with boiled linseed oil, which dries nicely and holds up pretty good. Fluid Film in a spray can is a good name too; haven't tried it but have heard good things.
     
    #8 Mendel Leisk, Feb 1, 2021
    Last edited: Feb 1, 2021
  9. Manuel Orellana

    Manuel Orellana Junior Member

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    Hi Guys!

    i wanted to report back on this, so this winter I actually got a check engine light P0456 small evap leak. A friend of mine has a friend that works at toyota my friend is also a mechanic so we took it out for a spin and as soon as the smell started we stopped the car and my friend was able to locate the exact area the smell was coming from. He called his friend at Toyota and he assumed that it a Vapor Canister Purge Valve Solenoid. The thing was dead when he checked it hence the check engine light, he also replaced the hoses which where original and cracked so anytime the weather would get cold the Vapors would leak into the engine compartment and into the cabin through the vent. A weird problem, I hope my solution helps others.
     
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  10. sam spade 2

    sam spade 2 Senior Member

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    And now might be a good time to mention that the Vapor Purge system can be adversely affected by over-filling the gas tank.
    :)
     
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