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  1. #1
    g60leigh's Avatar
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    hissing petrol cap and lumpy idle

    A bit of a grumble this one.
    On top of the airbox is a little valve. When i have it connected i have lumpy idle and can hear hissing from the fuel cap. If i disconnect it, it runs fine. I have been told it links to a charcoal filter and is something to do with fuel vapour purging. Does anyone know if it is needed? Should i replace the valve or leave it disconnected? ( while it is connected if you hit it it works ok for a short while)

    2001 S3 (AMK)
    AEM WMI Kit, Black Silicone Hoses, Badger5 TIP with Cone Filter, AH Fabrications FMIC, Relentless Manifold Downpipe & Sport Cat, Miltek Cat Back Exhaust, VAG Aero Wipers, Forge FMDV008 Re-Circ, Revo Stage 2 Remap with SPS+ Tweaks, 2.0 TFSI Coil Pack Mod, B&M Short Shift, RNS-D Retrofit, Brembo & B5 2 Piece Rotor Conversion

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  3. #2
    Broken Byzan's Avatar
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    I have the same, i repalced the valve and its good now

  4. #3
    g60leigh's Avatar
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    how much did it cost you? (and the stupid question- what is the part called?)
    Thanks

    2001 S3 (AMK)
    AEM WMI Kit, Black Silicone Hoses, Badger5 TIP with Cone Filter, AH Fabrications FMIC, Relentless Manifold Downpipe & Sport Cat, Miltek Cat Back Exhaust, VAG Aero Wipers, Forge FMDV008 Re-Circ, Revo Stage 2 Remap with SPS+ Tweaks, 2.0 TFSI Coil Pack Mod, B&M Short Shift, RNS-D Retrofit, Brembo & B5 2 Piece Rotor Conversion

  5. #4
    Broken Byzan's Avatar
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    N80 or purge valve £46.75 plus VAT from VAG parts

  6. #5
    AUDI TURBO's Avatar
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    anyone got a picture of this im sure my aeb 1996 a4 doesnt have this valve
    Modified primera :-)

  7. #6
    g60leigh's Avatar
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    mine definately does

    2001 S3 (AMK)
    AEM WMI Kit, Black Silicone Hoses, Badger5 TIP with Cone Filter, AH Fabrications FMIC, Relentless Manifold Downpipe & Sport Cat, Miltek Cat Back Exhaust, VAG Aero Wipers, Forge FMDV008 Re-Circ, Revo Stage 2 Remap with SPS+ Tweaks, 2.0 TFSI Coil Pack Mod, B&M Short Shift, RNS-D Retrofit, Brembo & B5 2 Piece Rotor Conversion

  8. #7
    Broken Byzan's Avatar
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  9. #8
    g60leigh's Avatar
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    Quote Originally Posted by Byzan A4
    thats the bit but mine is situtated on the top of the air box (Under a plastic cover)

    2001 S3 (AMK)
    AEM WMI Kit, Black Silicone Hoses, Badger5 TIP with Cone Filter, AH Fabrications FMIC, Relentless Manifold Downpipe & Sport Cat, Miltek Cat Back Exhaust, VAG Aero Wipers, Forge FMDV008 Re-Circ, Revo Stage 2 Remap with SPS+ Tweaks, 2.0 TFSI Coil Pack Mod, B&M Short Shift, RNS-D Retrofit, Brembo & B5 2 Piece Rotor Conversion

  10. #9
    Broken Byzan's Avatar
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    I dont have the cover is all. keeps the heat in too much IMO,lol

  11. #10
    olds_kool's Avatar
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    i snapped this bit the other day changing air filter, was wondering what it did as car seems ok without it, should i replace it straight away or can it wait a couple of weeks?

 

 

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