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Touble code has returned any ideas data log included

Discussion in 'A4/S4 forum(B5 Chassis)' started by marty.h, Jun 5, 2012.

  1. marty.h
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    marty.h Member

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    Car is a 1999 S4

    So far i have replaced the Y pipe to throttle body thats new have done the F pipe delete and have done the N249 delete i have presurised the system and it is airtight no leaks present and i keep getting this code

    17965/P1557/005463 - Charge Pressure Control: Positive Deviation


    The other mods on the car is a full miltec system from turbo back with sports cat's the car has not been remapped so im thinking that maybe due to the exhaust being more free flowing the boost threashold is being over-shot.

    Here is the Vag-com log 3rd gear WOT there is a glitch around collum 13/14 not sure what that is about

    [​IMG]


    can anyone shed any light on this or does the vehicle need a remap


    Also will it be fine to fit a boost controller to the vehicle and take the N75 out of the equation and set it to the correct boost levil


    Thanks for your time

    Marty
    Last edited: Jun 5, 2012
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  2. Turbo unit
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    Turbo unit Member

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    hi looks like a faulty N75 Valve you changed that??
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  3. Turbo unit
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    Turbo unit Member

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    And dont put a manaul boost controler on they are ****.....As i believe the s4 dont take to them very kindly and know to cause problems
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  4. marty.h
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    marty.h Member

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    Thanks for the replys i have leak tested it again and surprised to find a reserc leaking so have replaced both with 710N's and will be fitting a new N75 tonight
    #4
  5. Turbo unit
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    Turbo unit Member

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    Should work mint after that if not i would be looking at actuator's
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  6. marty.h
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    marty.h Member

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    Have fitted a new N75 the boost on the logs has stopped spiking and the like 2 stage boost it had has gone now pulls nice and smooth here is the logs

    3rd WOT

    [​IMG]



    4th WOT
    [​IMG]
    #6
  7. Turbo unit
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    Turbo unit Member

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    happy days fella
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