1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

S3 Fuel Pump Into A3 Fuel Pump Housing, Help Please!

VAG-Slag Aug 17, 2014

  1. VAG-Slag

    VAG-Slag Well-Known Member

    1,759
    405
    83
    I've just removed my fuel pump to fit the S3 pump I have bit I've noticed the S3 pump has an extra inlet/outlet that isn't on the original pump... I'm guessing its the fuel return?

    Do I just take this hose:
    [​IMG]

    And stick it on this bit of the new pump:
    [​IMG]

    Or do I need a S3 housing?...

    Thanks
     
    Last edited: Aug 18, 2014
  2. Machine212

    Machine212 Active Member

    120
    30
    28
    S3 has two fuel pumps, pretty sure the extra pipe is where it receives fuel from the other pump. Should be fine without it.
     
    Last edited: Aug 17, 2014
  3. snowy

    snowy Active Member

    430
    106
    43
    thats an outlet to feed the 2nd pump, not a return
    the 2nd pump is a venturi pressure driven type thing
    just point the s3 2nd outlet back into tank
    as in an lcr
     
  4. Machine212

    Machine212 Active Member

    120
    30
    28
    Ah thats it, got it the other way round. Doesn't receive fuel, sends it to the other pump.
     
  5. VAG-Slag

    VAG-Slag Well-Known Member

    1,759
    405
    83
    Cool, cheers for your help fallas... I've had a little fiddle and bodged this together:
    [​IMG]

    Will that do the job? . .

    p.s that pipe ends pretty much as soon as it's out of shot
     
  6. Machine212

    Machine212 Active Member

    120
    30
    28
    I would guess so! Heres a picture of mine i did not too long ago. This is an S3 one though.

    10492167_10152139339216836_6345511765001876305_n.jpg
     
  7. badger5

    badger5 www.badger5.co.uk Site Sponsor

    9,507
    2,003
    113
    you block the additional outlet up.
    sytec pump would have been simpler
     
  8. snowy

    snowy Active Member

    430
    106
    43
    For ref, a pic of the LCR swirl pot - the secondary feed is the black line fed into the bottom of the swirl pot


    [​IMG]
     
  9. badger5

    badger5 www.badger5.co.uk Site Sponsor

    9,507
    2,003
    113
    thats a non VDO pump pictured btw.. VDO is the most commonly fitted.. and does'nt look like your pictured one
     
  10. snowy

    snowy Active Member

    430
    106
    43
    The pic is merely to illustrate how VAG themselves designed a swirl pot to fit a dual outlet pump into a single pump application
     
  11. badger5

    badger5 www.badger5.co.uk Site Sponsor

    9,507
    2,003
    113
    I see now... but the op's pump was VDO and does'nt have this type
     
  12. VAG-Slag

    VAG-Slag Well-Known Member

    1,759
    405
    83
    Cheers for the heads up Bill, I'll block the end of that hose off before putting it back in the tank then... Was gonna give you a call to talk about other fuel pump option soon anyway!
     
  13. Wadder

    Wadder New Member

    2
    0
    1
    I hate to dig this thread up but I am fitting a quattro fuel pump to my 1.8t the only thing I'm unsure about is the extra pipe what should I do with it ...is it a feed for pump or a return to other tank I would like to know badly I want to bock it up
     
  14. IanPG

    IanPG Well-Known Member Team Nogaro Blue Silver Supporter Audi S3

    1,204
    456
    83
    it hooks up to the pump on the PAX side fuel tank. there is already a hose and quick connect in the s3 fuel tank to which a thin hose with male connector goes to from the s3 fuel pump.... guessing your A3 won't have that receiving end there so I guess just block the nipple off at the pump
     
    Wadder likes this.
  15. Wadder

    Wadder New Member

    2
    0
    1
    I have a golf mk4 and yes I know to blanket it off so is that pipe a feed from other tank or is it a return I do know if it sucks or pushes feel either way and if I blank it off will it not affect the running of it ?
     
  16. badger5

    badger5 www.badger5.co.uk Site Sponsor

    9,507
    2,003
    113
    blank it, works fine. or just buy the uprated 2wd intank pump as direct swap
     
    IanPG likes this.

Share This Page