Fuel vapour control failure

Discussion in 'Peugeot 308' started by MartinManor, Jun 17, 2023.

  1. MartinManor

    MartinManor

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    I have a 65 plate 308 1.2 puretech 130. There's a failure with the system that is supposed to control the escape of fuel vapour from the fuel tank. Some device fitted inside of or integral to the fuel tank has failed and instead of only allowed vapour to pass, it's now allow liquid petrol to pass as well. This only happens when the tank is more than about 2/3rds full. The fuel has now filled up the carbon filter intended for vapour only, and enters the pipe running to the inlet manifold which is intended to burn off any vapour only. Thi excessive fuel cause rough running and can stall the engine occasionally.
    Iv been managing this for some time by only filling the tank to half full. The fault was diagnosed in a Peugeot main dealer who has give a £2000 ballpark figure to "fix" the problem as they say the vapour separating device cannot be replaced and they want to replace everything from the tank, fuel lines, carbon canister, etc, etc.
    Their mechanic said he sees maybe a couple of cars with this problem in a year. Surely there has to be a more sensible fix. Main dealers just like to replace things. There has to be a proper engineer out there who's worked out a better solution. Does anyone know where this can sensibly be resolved?
     
    MartinManor, Jun 17, 2023
    #1
  2. MartinManor

    John n

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    Hi martin, did u resolve this issue? I have the same. Im considering blocking off the old vapour valves in the tank and fitting aftermarket ones .
     
    John n, Jan 29, 2024
    #2
  3. MartinManor

    Brian3373

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    I appear to have same issue on 2016 308 1.2 Puretech, dealer says fuel tank and charcoal canister needs replacing.
    My question, did this work cure your issues?
     
    Brian3373, May 13, 2024
    #3
  4. MartinManor

    John n

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    Hi Brian, it would solve the issue as it is one of the two vent valves that has failed in the top of the tank. These are not replaceable. The carbon canister may or may not need changing. The problem is that despite knowing it's an issue Peugeot won't help with anything as my car is over their goodwill period. So they want to charge me 1200 just for parts.
    I have just been using half the tank but am going to fit an aftermarket fuel/vapour separator soon slightly higher than the tank above the rear axle. I'm hoping this will solve the problem allowing fuel to drain back to the tank and only vapour to reach the carbon canister.
    John
     
    John n, May 13, 2024
    #4
    Brian3373 likes this.
  5. MartinManor

    John n

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    John n, May 13, 2024
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  6. MartinManor

    Brian3373

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    Brian3373, May 14, 2024
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  7. MartinManor

    Brian3373

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    Thank you for coming back to me.
    I've got mine booked in for new tank, fuel absorber and oil/filter change.
    Eye watering £2100.
    Couldn't trust the car, so needed doing.
    Please let me know how you get on with after market valves.

    Mine has been playing up until around quarter of a tank.
     
    Brian3373, May 14, 2024
    #7
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