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N75j on my standard car

Discussion in 'A4/S4 forum(B5 Chassis)' started by Ardz83, Jul 18, 2011.

  1. Ardz83
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    Ardz83 Member

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    [Jul 18, 2011]
    Hi guys
    I have heard that a N75J valve may help my performance abit. Will this work on my standard 1.8t 1998 A4?? Or will it just screw with my ecu and go into limp mode?

    Thanks in advance
    Dan
    #1
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  3. Oranoco
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    Oranoco Well-Known Member

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    [Jul 19, 2011]
    You can save a fortune by nodding the existing N75. Simply remove the valve and turn the screw in the recess 1/4 to 1/2 turn anti-clockwise. Screw is bastard tough to turn though so make sure the screwdriver is a good fit.
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  4. Ardz83
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    Ardz83 Member

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    [Jul 20, 2011]
    I just unplugged it and the car runs so much smoother it's unreal. Is that right??
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  5. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Jul 20, 2011]
    um no.

    With it unplugged you'll only get 4psi of boost.
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  6. Ardz83
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    Ardz83 Member

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    [Jul 20, 2011]
    That's all I was getting anyway. Wrong?
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  7. Oranoco
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    Oranoco Well-Known Member

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    [Jul 20, 2011]
    You should be getting 7psi on a standard car.
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  8. Ardz83
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    Ardz83 Member

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    [Jul 20, 2011]
    No I'm not seeing that. 4-5 psi is all I'm getting. Should I try a new n75?
    #7
  9. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Jul 20, 2011]
    are there any fault codes?

    Perhaps you've got a boost leak?
    #8
  10. Ardz83
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    Ardz83 Member

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    [Jul 20, 2011]
    I'm bidding on a vagcom as we speak. O do have a forge split r valve of that makes a difference?
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  11. NineNails
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    NineNails Proud sponsor of the snack food industry

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    [Jul 20, 2011]
    A common problem with the N75 is the wiring that goes to it. It can break internally. It seems not quite long enough to me. This was my problem anyway and I've heard of it happening to others too. Good luck with it
    #10
  12. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Jul 20, 2011]
    Yeh that happened to the old A4 of ours.
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