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

How to clean N75 valve

Discussion in 'A3/S3 Forum (8L Chassis)' started by dany2k, Jan 10, 2011.

  1. dany2k

    dany2k Member

    Joined:
    Dec 7, 2010
    Messages:
    318
    Likes Received:
    5
    Hi all,
    Can anybody point me in the direction of where the N75 valve is (with a picture if possible) and how to go about giving it a clean... eletrical contact cleaner the thing I need? I've got a couple of days of work and this is just about the only thing wrong with her at the moment, and may as well give it a go :)

    Danny
     
  2. Google AdSense Guest Advertisement



    to hide this advert.
  3. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow...
    Staff Member Moderator Audi S3

    Joined:
    Sep 14, 2008
    Messages:
    18,216
    Likes Received:
    2,403
    ermmm... why do you need to clean it may I ask?

    <tuffty/>
     
  4. dany2k

    dany2k Member

    Joined:
    Dec 7, 2010
    Messages:
    318
    Likes Received:
    5
    a bright spark suggested it a couple of posts ago :) nothing to lose, probably needs replacing really but give it a clean if i can!
     
  5. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow...
    Staff Member Moderator Audi S3

    Joined:
    Sep 14, 2008
    Messages:
    18,216
    Likes Received:
    2,403
    What problem is it you have that means you have to do this? when they don't work they tend to throw a code or drop boost to actuator level...

    <tuffty/>
     
  6. Welly

    Welly VX220 SC Driver :)

    Joined:
    Aug 5, 2009
    Messages:
    10,699
    Likes Received:
    121
    If it's not broken, don't fix it....
     
  7. dany2k

    dany2k Member

    Joined:
    Dec 7, 2010
    Messages:
    318
    Likes Received:
    5
    i'll fill u in mateys, so u dont think im just a madman deciding to clean his n75 just because he's bored :)

    on the 0-30 sprint i feel a slight 1/2 second worth of hesitation: enough of a hesitation for *insert random boy racer car* to gain a decent foothold.

    vagcom flagged up something that pointed towards the n75 valve too: 17963 charge pressure maximum limit exceeded

    it also flagged up something else recently which hasnt come back yet: something relating to the pre-cat o2 lambda sensor.

    any ideas..?
     
  8. hades-

    hades- Yorkshire & Humber Rep.
    Regional Rep VCDS Map User

    Joined:
    Jul 8, 2008
    Messages:
    9,415
    Likes Received:
    625
    i doubt you can clean them
    just buy a new 1 if needed
     
  9. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow...
    Staff Member Moderator Audi S3

    Joined:
    Sep 14, 2008
    Messages:
    18,216
    Likes Received:
    2,403
    Check pipes for leaks would be the first thing then get the actuator tested for opening pressure... a boost gauge would be useful to check what boost there is to trip this as would a few logging runs with VAGCOM...

    Not entirely convinced the N75 is at fault here tbh... N75 issues are usually accompanied with N75 fault codes... a new valve is around the £50 mark, expensive if thats not the prob... do you have access to VAGCOM?

    <tuffty/>
     
  10. dany2k

    dany2k Member

    Joined:
    Dec 7, 2010
    Messages:
    318
    Likes Received:
    5
    uv got a point re. the new valve: if im being honest, i changed the MAF in similar circumstances :-( i do have access to vagcom, what should i be looking for? could the lambda sensor fault point to something?
     
  11. Welly

    Welly VX220 SC Driver :)

    Joined:
    Aug 5, 2009
    Messages:
    10,699
    Likes Received:
    121
    Normally the Lambda...
     
  12. quattro1

    quattro1 Member

    Joined:
    Jul 19, 2010
    Messages:
    640
    Likes Received:
    7
    heres the n75 mate, check all pipes going to and from it for splits :thumbsup:

    [​IMG]
     
  13. dany2k

    dany2k Member

    Joined:
    Dec 7, 2010
    Messages:
    318
    Likes Received:
    5
    cheers matey, much appreciated! i'll have a look when the sun rises :) oh... and very nice and clean engine bay btw well done!
     
  14. quattro1

    quattro1 Member

    Joined:
    Jul 19, 2010
    Messages:
    640
    Likes Received:
    7
    sadly not my bay :( lol mine doesnt look too disalike though!!! :laugh:

    ;)
     
  15. deano8406

    deano8406 New Member

    Joined:
    Jul 4, 2013
    Messages:
    1
    Likes Received:
    0
    where would the best place be to get a new n75?
     
  16. thegoal007

    thegoal007 Another S3 owner....

    Joined:
    Apr 9, 2008
    Messages:
    779
    Likes Received:
    19
    tps.
     

Share This Page