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n75 valve talk to me

Discussion in 'A4/S4 forum(B5 Chassis)' started by jaymodunn, Mar 20, 2014.

  1. jaymodunn
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    jaymodunn Member

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    o.k which vavle for my audi a4 1.8t quattro ajl, as i can't find it, and where to buy, cheers
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  2. jaymodunn
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    jaymodunn Member

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    anyone around...

    i have located it but how the f do you remove it as i can't get to it..
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  3. Bradderz_1988
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    Bradderz_1988 Dont replace it, Upgrade it !!

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    TPS is around £30 iirc

    Best way of doing it is by removing the airbox followed by the Puck valve then you should have enough room/movement in the intake pipe to remove the N75 valve, whrn i swapped mine out i pulled the pipes off the turbo/wastegate then swapped them to the new one of the car, make a note which pipe goes where before you remove it.

    Part number :- 058906283F
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  4. jaymodunn
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    jaymodunn Member

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    cheers i own a fwd 1.8t a4 as well and was going to swap them over to test but looks like that can't be done. cheers
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  5. Bradderz_1988
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    Bradderz_1988 Dont replace it, Upgrade it !!

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    Whats your thinking as to why there not interchangerable ??

    There exactly the same part !!
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  6. jaymodunn
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    jaymodunn Member

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    something about to remove it you cut the pipe.

    The problem i have is i can't find a diy i have ordered a Haynes manual, but don't want to start and not finish. but if you say i should be able to take it off and put it back on i will give it a shot. cheers

    I have got to the part how do you remove the metal clips
    Last edited: Mar 22, 2014
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  7. Bradderz_1988
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    Bradderz_1988 Dont replace it, Upgrade it !!

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    Just pull the pipes whilst rotating then and they should work free.
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  8. jaymodunn
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    jaymodunn Member

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    you make it sound so easy consireing the space and how tight they are clamped it is impossible. i am going to buy a clip untightener

    edit now off what an arse and i have nicked one of the pipes so will wait for a new one to fit. thanks for the assistance.
    Last edited: Mar 22, 2014
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  9. jaymodunn
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    jaymodunn Member

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    put new one on now says n75 open have i put it on wrong or is it faulty?

    showing as same fault now tried again this is pissing me off now.
    Last edited: Mar 25, 2014
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  10. Sulli79
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    Sulli79 Active Member

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    Have you checked the wiring? Especially around where the wires enter the plug?
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  11. jaymodunn
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    jaymodunn Member

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    yes it looks good. the problem is it is made out it is easy to replace when in reality it is a pita. I haveb worked on french cars and they are easier to work on then audi. I could spend forever trying to fix it so selling it at a loss, just want rid when i read up it could be loads of different things.
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  12. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    wtf?
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  13. jaymodunn
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    jaymodunn Member

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    just venting, i want to get the car working but i think it might be a dud so might but my losses and try and get better quality one.
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  14. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    Assuming its brand new its unlikely to be faulty.

    Its probably broken wires in the cable leading to it, i've had that before. No damage was visible. I cut about 8 inches off the cable and spliced in 8" of new wires and a new connector.
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  15. jaymodunn
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    jaymodunn Member

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    TBH I might have knicked the pipe on the right hand side, could this cause issues. Also is the n75 always related to the valve, could it be elsewhere?
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  16. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    Depends on the exact fault code, but if its saying the valve is open circuit, then its the valve or the wiring.
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  17. jaymodunn
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    jaymodunn Member

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    got it booked into a garage to have a look and hopefully fix problem, i hope ir isn't critical, the turbo does seem to whine a bit, but i have been looking at k04-015 in case.
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  18. jaymodunn
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    jaymodunn Member

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    o.k the garage says wiring fine boost and turbo spinning but could be siezed dump valve or something else.. how easy to replace?
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  19. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    you have a fault code for N75 open circuit.

    Thats not caused by a siezed dump valve, its caused by an open circuit on the N75. That can only be caused by two things. 1) a broken N75. 2) broken wiring.

    Dump valve is cheap and easy to replace, they're about £25 from the dealer (get the TT225 version as its stronger) But i doubt thats whats wrong here.
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