Need help with Legnum boost issue.

Discussion in 'Victoria' started by Ben, Jun 20, 2015.

  1. Ben

    Ben Member

    Joined:
    Feb 9, 2013
    Messages:
    17
    Likes Received:
    3
    Location:
    VIC
    First Name:
    Ben
    Drive:
    Legnum
    I am located near Greensborough on the North side of Melbourne.

    I am having a problem with my legnum stuttering under WOT and not coming onto boost properly.

    I need someone to help me conduct a boost leak test, or point me toward a workshop nearby that could help with the issue.

    Any help appreciated

    I have been having trouble with my 97 PFL Auto Legnum over the last couple of months. Overall:

    - Removed factory boost solenoid to remove restrictor. Broke solenoid.
    - Ordered second hand boost solenoid from member on here.
    - Installed second hand boost solenoid along with new vacuum lines.
    - Car hesitates to come onto boost and will not go above 5psi. Stutters on WOT
    - Removed second hand boost solenoid altogether and ran vacuum line between actuators and intercooler piping.
    - Car still hesitates to come onto boost and will not go above 5psi. Stutters on WOT

    The car should be running wastegate pressure, but wont actually come onto boost. (boost gauge)

    I have visually checked all of the vacuum lines in the engine bay for damage - nothing so far.

    Fuel consumption is higher than normal

    I can drive the car around all day off boost without an issue. Runs fine. Blows no smoke etc. But as soon as I ease onto boost, nothing..

    All vacuum lines are as per this diagram

    http://s69.photobucket.com/user/idntlikedomestic/media/hoses.jpg.html

    Any ideas please?
     
    Last edited by a moderator: Jun 20, 2015
  2. Dice

    Dice 1 AYC Bar Lifetime Member

    Joined:
    Jul 15, 2009
    Messages:
    1,223
    Likes Received:
    237
    Location:
    Melbourne Victoria
    First Name:
    DiceR
    Drive:
    Super VR-4 Legnum
    Tech sport aren't bad but they don't have a good boost leak test with high pressure because they don't have the correct fitting size for vr4s. (Apparently evo specific sizes pipe they do have which seems a bit odd that they're much different).

    How old and what type of spark plugs do you have?
     
  3. TME_Steve

    TME_Steve 3 AYC Bars Trader

    Joined:
    Jan 12, 2010
    Messages:
    4,604
    Likes Received:
    949
    Location:
    NSW
    First Name:
    Steve
    Drive:
    2010 nt did pajero tow car / 2000 6spd gc8 wrx tarmac rally car / 2000 Manual Subaru Outback 2.5 just a car
    Sounds like a leak. Where are you located?
     
  4. Ben

    Ben Member

    Joined:
    Feb 9, 2013
    Messages:
    17
    Likes Received:
    3
    Location:
    VIC
    First Name:
    Ben
    Drive:
    Legnum
    I am located near Greensborough on the North side of Melbourne.

    BKR6ES gapped to 0.8 - Installed 2000km ago.
     
  5. Vstar_83

    Vstar_83 Leaving Skid Marks

    Joined:
    Apr 27, 2015
    Messages:
    220
    Likes Received:
    40
    Location:
    Adelaide
    First Name:
    Matthew
    Drive:
    96 Gen 8 VR4 Galant
    Have you checked all the other boost leak threads on here? I still have a boost leak or something, I'm starting to think it might be my solenoid . Hope you get it fixed.
     
  6. NuffNuff

    NuffNuff 1 AYC Bar Lifetime Member

    Joined:
    May 21, 2012
    Messages:
    945
    Likes Received:
    292
    Location:
    Victoria
    First Name:
    Damian
    Drive:
    GTI, GTI, FL Manual Legnum VR4
    what BOV have you got? is it venting to atmosphere?
     
  7. Ben

    Ben Member

    Joined:
    Feb 9, 2013
    Messages:
    17
    Likes Received:
    3
    Location:
    VIC
    First Name:
    Ben
    Drive:
    Legnum
    Thanks for the replies.
    Removed bov and blocked vacuum line. Issue still remains
     
  8. NuffNuff

    NuffNuff 1 AYC Bar Lifetime Member

    Joined:
    May 21, 2012
    Messages:
    945
    Likes Received:
    292
    Location:
    Victoria
    First Name:
    Damian
    Drive:
    GTI, GTI, FL Manual Legnum VR4
    Hey Dice what size should we get to do our own boost tests?
     
  9. trotty

    trotty 3 AYC Bars

    Joined:
    Oct 27, 2012
    Messages:
    1,534
    Likes Received:
    533
    Location:
    nsw
    First Name:
    Daniel Trotman
    Drive:
    2000 vr4 Legnum 5 sp man
    2006 Suzuki Swift Sport 5 sp man
    I use 2.75' and 2.5' blank ends for my boost leak testing.
     
    Vstar_83 likes this.
  10. Ben

    Ben Member

    Joined:
    Feb 9, 2013
    Messages:
    17
    Likes Received:
    3
    Location:
    VIC
    First Name:
    Ben
    Drive:
    Legnum
    Installed a new set of spark plug leads and cleaned the coilpacks with contact cleaner, and the car is back to normal.
     
    Vstar_83 likes this.

Share This Page