Peugeot 307 - fuel smell in the cabin
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  1. #1
    Member 405STi's Avatar
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    Default Peugeot 307 - fuel smell in the cabin

    Hello froggers

    I have a baffling problem with my unleaded 2005 Peugeot 307. i am getting fuel smells on occasion inside the cabin.

    This seems to occur when:
    - i am driving along and come to an abrupt stop
    - seems to be worse when going downhill
    - seems to be worse when the car is warm having driven around for a while

    So when i come to a stop i get a good whiff, that is hard to stand and i have to open the windows. When i drive off and am cruising along it goes away. It doesnt happen all the time and im not sure what triggers it.

    I have:
    - changed the fuel charcoal canister
    - changed air con filter
    - checked around the fuel pump - it is dry

    Does anyone have any ideas what i can do/check/change/fix. its been ongoing issue for over a year and noone can seem to track the problem

    Thanks in advance
    Evan

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    05 Peugeot 307


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    93 Peugeot 405 STi
    89 Peugeot 405 Mi16
    82 Peugeot 505 GR

  2. #2
    1000+ Posts luthier's Avatar
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    Have you lifted the back seat to expose where the fuel sender goes to see if that plate is leaking? Have you checked the filler hose at both ends and along it's length to make sure it isn't cracked?
    Have you checked that the filler cap is not leaking? Have you checked that the overflow pipe from the top of the filler neck is not blocked?
    Otherwise I wouldn't have a clue.

  3. #3
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    I'm not sure if these are the same as 206's in a lot of respects, but I think they are similar. 206's leak around the ring on top of the tank and also there's a little plastic piece the fuel pipe attaches to that can get a pinhole in it that either needs youto replace the integrated sender/pump OR some people plastic weld it with a soldering iron.

    The other source has something to do with the rubber pipes going up to the filler neck, but I'm not sure of the details.


    2003 PEUGEOT 206 GTi

  4. #4
    1000+ Posts dmccurtayne's Avatar
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    1.6 or 2.0 have you got a code reader that shows fuel trims


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  5. #5
    Fellow Frogger! CC1701's Avatar
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    although you've replaced it already, it has all the symptoms of a faulty purge (charcoal) canister, valve or hose.
    Did you use a new canister?

  6. #6
    1000+ Posts dmccurtayne's Avatar
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    Good thing with 307s valve comes with the canister


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  7. #7
    Member 405STi's Avatar
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    thanks for the responses everyone.

    - it is a 2.0 model - and i have no code reader.

    - i have had the purge canister replaced

    The current mechanic has now given up (a few have not had luck finding the issue now, my wallet isn't really happy either) and i dont really have the expertise to do much of this on my own. Can anyone recommend someone in the Sydney area (i dont mind to travel a few hours if they can look on the day) who could look at some of Stuey's recommendations.

    Thanks again
    Last edited by 405STi; 20th March 2019 at 01:30 PM.
    05 Peugeot 307


    Past pugs
    93 Peugeot 405 STi
    89 Peugeot 405 Mi16
    82 Peugeot 505 GR

  8. #8
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  9. #9
    1000+ Posts dmccurtayne's Avatar
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    Default Peugeot 307 - fuel smell in the cabin

    You donít need to travel if you could get somebody to check the long and short term fuel trims they should be as close to zero as possible since you have replaced the canister that includes the purge valve and I assume that youíve checked the top of the pump through the back seat hole I thinking you have some sort of fuel delivery or vacuum inconsistencies would love to have a look but Newcastle is to far any basic obd code reader will give you fuel trims if they are not close to zero bring the revs up and see if they correct.
    The 307 fuel tank and pipe work is all one piece.


    Garage C5 X7 3008 XTE
    Gone but not forgotten 206 GTI 180 306 XR SED 405 MI16 x2 xzara VTS 406 SV 206 XT Berlingo 2011 (best car ever) 306 HDI 307 XSE HDI touring
    Fix it right the first time

  10. #10
    Member 405STi's Avatar
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    The mechanic had it hooked up to the computer, im sure he would of check the trims.

    Mechanic said he checked the whole fuel line and nothing.

    I also checked the top of the pump under the back seat, no signs of fuel or smell.

    I feel the smell is coming from the engine bay through the AC. Ill do some more tests on the weekend to see if i have all the air and fan off whether it is as evident.


    I might need to take you up on that offer dmccurtayne and come up to Newcastle one weekend as im at a loss here
    05 Peugeot 307


    Past pugs
    93 Peugeot 405 STi
    89 Peugeot 405 Mi16
    82 Peugeot 505 GR

  11. #11
    1000+ Posts dmccurtayne's Avatar
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    Got a vin number


    Garage C5 X7 3008 XTE
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  12. #12
    Fellow Frogger! Commerciale's Avatar
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    Did you check the seal on the filler cap? I had a similar problem with a Volvo - the seal looked OK but was not seating correctly. Mark the seal with radial crayon lines or something similar which will rub off where the cap seals against the neck. This will show if and where the seal is not contacting. The smell when accelerating or stopping could be caused by the fuel sloshing in the tank and up the filler neck.

  13. #13
    Member 405STi's Avatar
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    Thanks for the help guys - ive been busy of late but will check the cap on the weekend and ill get the VIN.

    Of note - i went for a lengthy drive on Sunday and kept the AC on recirculate the whole time and didnt smell a thing. Right at the end of the journey i took it off recirculate and got a whiff.. Surely that means its originating under the bonnet somewhere near the AC intake?
    05 Peugeot 307


    Past pugs
    93 Peugeot 405 STi
    89 Peugeot 405 Mi16
    82 Peugeot 505 GR

  14. #14
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    What it does confirm is that it's not the tank ring! I think your conclusion is logical.


    2003 PEUGEOT 206 GTi

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