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Fuel leak!!

Discussion in 'A4/S4 forum(B5 Chassis)' started by Crash, Aug 4, 2009.

  1. Crash

    Crash Member

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    Hey all, was wondering if someone could perhaps shed some light on this. I've just returned from holiday so my B5 S4 has been sitting peacefully in the drive for about 2 weeks without moving a muscle. After returning, I've gone to start the car and probably left it idle for around 10 minutes.

    After going out for a short drive and returning I've noticed a patch on the floor (about the size of a rugby ball... maybe bigger) which upon putting my finger in smelt strongly of petrol. At least one part of the patch was fresh.

    Just had this checked out today and there is indeed a leak from the top of the fuel tank area, but for the last 2 weeks the car has been on less than 1/4 tank full. Fuel patch was at the back of the car, more to the driver side and around the fuel tank area. I can't figure out what could have happened here... I'm quite concerned! Any ideas? :unsure:
     
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  3. aragorn

    aragorn "Stick a V8 in it!"
    Staff Member Moderator VCDS Map User

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    Craigs S4 did exactly the same thing, and it was one of the unions on the fuel filter. It seemed to have got a bit rusty or something, and started leaking without ever having been touched.

    We baught a new filter and went to change it, then realised the tank needs dropped to do it, so instead just heaved on the union to tighten it up a bit more and that seemed to fix it.
     
  4. Crash

    Crash Member

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    Ah really! Very interesting.. thanks for the quick reply, I'll give that a go. Might also be worth mentioning that it has'nt happened since, not sure if Craigs leaked more than once?
     
  5. Blue_Thunder

    Blue_Thunder Well-Known Member

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    MRC had seen some cars recently which had been filled up with a suspected dodgy batch of V-Power which had caused the fuel lines to corrode.
     
  6. Droptop

    Droptop New Member

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    nothing to do with the fuel problem but leaving any car to warm at idle isnt good for it :)
     

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