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does your 355 suck? mine does

Discussion in '348/355' started by ahrddr, Jan 8, 2010.

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  1. ahrddr

    ahrddr Rookie

    Aug 1, 2007
    45
    So Cal/N. VA/FL
    #1 ahrddr, Jan 8, 2010
    sorry for the teaser subject line. just trying to get some eyeballs on my thread to get a wide consensus. Since I have owned my 355 (96 355gts 3rd owner), every time I unscrew the gas cap it's like i'm breaking open a hyperbaric chamber and air--very loudly and quickly-- SUCKS INTO the filler tube as I finish unscrewing the gas cap and the pressure equalizes between the clearly lower pressure in the tank. Is this normal? Does everyone experience this or do I have a gas tank ventilation problem. I'm glad it's a screw cap style because if it wasn't I might have to use a crow bar to get the cap off judging by the pressure delta. Anyway, I appreciate any feedback anyone can give me. It's the only car I've ever owned (high performance or not) that has this "feature". As always, thank you in advance for reading my thread and for any advice you can give.
    -andy
     
  2. race850i

    race850i Karting

    Jan 6, 2010
    132
    Germany
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    Themis
    #2 race850i, Jan 8, 2010
    Its totally normal.Mine does it too.
    Its a safety system if the car get up side down in a crash not to get on fire!
     
  3. SonomaRik

    SonomaRik F1 Veteran

    Dec 15, 2006
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    #3 SonomaRik, Jan 8, 2010
    Last edited: Jan 8, 2010
  4. eric355

    eric355 Formula 3
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    Nov 30, 2005
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    Eric DECOUX
    #4 eric355, Jan 8, 2010
    Very strange ... the air should go the other way, and flow OUT OF the filler tube due to the higher pressure in the tank.
     
  5. Saint Bastage

    Saint Bastage F1 Rookie

    Jun 1, 2007
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    Lane
    #5 Saint Bastage, Jan 8, 2010
    Thats funny....my 348 blows.

    lots of pressure in the tank wants to blow the cap off when I remove it.
     
  6. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
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    #6 Rifledriver, Jan 8, 2010
    It is for emissions.....not safety. All cars have a sealed fuel system and depending on how it is designed and the conditions at that moment it can have a little vacuum or a little pressure.
     
  7. rallo1

    rallo1 Karting
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    #7 rallo1, Jan 8, 2010
    there is a check valve for the tank vent system. might be in back words.
     
  8. Sandy Eggo

    Sandy Eggo F1 Rookie
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    #8 Sandy Eggo, Jan 8, 2010
    I just figured that noise was the money whooshing out of my wallet.
     
  9. UConn Husky

    UConn Husky F1 Rookie

    Nov 11, 2006
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    #9 UConn Husky, Jan 8, 2010
    I learned early on not to over tighten or else you'll make youtube as 'Ferrari owner can't open gas cap'
     
  10. eulk328

    eulk328 F1 Rookie

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    #10 eulk328, Jan 8, 2010
    Last edited: Jan 8, 2010
    I believe mine (355) is sucking (not blowing) and it really takes a looooong time for the sound to stop. Seems excessive to me and I worry about collapsing the tank from too much vacuum. My Saab has a properly functioning sealed system and does not noticeably blow or suck.
     
  11. SonomaRik

    SonomaRik F1 Veteran

    Dec 15, 2006
    6,904
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    #11 SonomaRik, Jan 8, 2010
    been there done that.
     
  12. Dutchman

    Dutchman F1 Veteran
    Lifetime Rossa Owner

    Dec 4, 2002
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    #12 Dutchman, Jan 8, 2010
    :)
     
  13. No Doubt

    No Doubt Seven Time F1 World Champ

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    #13 No Doubt, Jan 8, 2010
  14. AceMaster

    AceMaster Three Time F1 World Champ

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    #14 AceMaster, Jan 9, 2010
    ditto
     
  15. AceMaster

    AceMaster Three Time F1 World Champ

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    #15 AceMaster, Jan 9, 2010
    Last edited: Jan 9, 2010
    No, it was the car exhaling a sigh of relief that it is not going to die of thirst because you are about to quench its thirst :)
     
  16. Jeff348

    Jeff348 Formula Junior

    Aug 2, 2005
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    jeff spezzano
    #16 Jeff348, Jan 9, 2010
    Mine too. I almost ran out of gas. Until I realized I could use the spill flap as leverage. lol
     
  17. rbellezza

    rbellezza F1 Rookie

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    Roberto Bellezza
    #17 rbellezza, Jan 9, 2010
    Mine too !
     

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