Page 1 of 2 12 LastLast
Results 1 to 10 of 17

Thread: Disco Td5 still surging with WOT??!!

  1. 18th December 2013, 09:38 PM #1
    armandnel's Avatar
    armandnel
    armandnel is offline Fossicker
    Join Date
    Jul 2010
    Location
    QLD, Central Highlands.
    Posts
    48
    Total Downloaded
    0

    Question Disco Td5 still surging with WOT??!!

    Ok. So she has 130k on the clock and is a '04 auto Disco. She started surging when putting the foot down to overtake/towing and so on.
    I went and changed the Mass Air Flow meter and it improved performance but did not fix the surging.
    I then changed the Turbo Boost Modulator, no change.
    The Fuel Pressure Regulator had a small leak so I replaced it with a new part ($300 ouch) as it could be a source of the surging...still surging??!!
    I also checked the actuator rod to the turbo and it moves freely so what is left to replace gentlemen?
    I'd really like to get this sorted before my Chrissy run to Fraser.

    I eagerly await your suggestions AND how to troubleshoot and fix
    BTW I do all the work myself fwiw.

    Cheers

    Armani
    Reply With Quote Reply With Quote
  2. 18th December 2013, 09:56 PM #2
    Graeme
    Graeme is offline Swaggie Vendor
    Join Date
    Jan 1970
    Location
    NSW SW Slopes
    Posts
    12,043
    Total Downloaded
    0
    Have you checked if the wastegate actuator operates? It uses pressure to push the rod.
    MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
    VK2HFG and APRS W1 digi, RTK base station using LoRa
    Reply With Quote Reply With Quote
  3. 18th December 2013, 10:08 PM #3
    armandnel's Avatar
    armandnel
    armandnel is offline Fossicker
    Join Date
    Jul 2010
    Location
    QLD, Central Highlands.
    Posts
    48
    Total Downloaded
    0

    Smile

    No I dint check it how do I go about it and how much pressure am I looking at here?
    Reply With Quote Reply With Quote
  4. 18th December 2013, 10:54 PM #4
    davrac's Avatar
    davrac
    davrac is offline Master
    Join Date
    Jun 2010
    Location
    Hobart, TAS
    Posts
    246
    Total Downloaded
    0
    Yep sounds like overboost. How bad is the surge? Like a fuel cut kind of surge?
    Reply With Quote Reply With Quote
  5. 19th December 2013, 05:40 AM #5
    Graeme
    Graeme is offline Swaggie Vendor
    Join Date
    Jan 1970
    Location
    NSW SW Slopes
    Posts
    12,043
    Total Downloaded
    0
    A quick squirt from an air hose will move it. As its operated by pressure from the turbo outlet which normally maxes at just over 20 psi, don't give it too much of a blast.
    MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
    VK2HFG and APRS W1 digi, RTK base station using LoRa
    Reply With Quote Reply With Quote
  6. 19th December 2013, 07:10 AM #6
    armandnel's Avatar
    armandnel
    armandnel is offline Fossicker
    Join Date
    Jul 2010
    Location
    QLD, Central Highlands.
    Posts
    48
    Total Downloaded
    0
    Quote Originally Posted by davrac View Post
    Yep sounds like overboost. How bad is the surge? Like a fuel cut kind of surge?
    Yes it's pretty bad. I cuts back in and out like your messing around with the fuel throttle. How is overboost cured?
    Reply With Quote Reply With Quote
  7. 19th December 2013, 07:22 AM #7
    Graeme
    Graeme is offline Swaggie Vendor
    Join Date
    Jan 1970
    Location
    NSW SW Slopes
    Posts
    12,043
    Total Downloaded
    0
    The ecm cuts fuel if it detects via the MAP sensor that boost pressure is too high. Failure of any component that normally limits boost will trigger fuel cut, which normally occurs around 2500 rpm on wider throttle openings.
    MY21.5 L405 D350 Vogue SE with 19s. Produce LLAMS for LR/RR, Jeep GC/Dodge Ram
    VK2HFG and APRS W1 digi, RTK base station using LoRa
    Reply With Quote Reply With Quote
  8. 19th December 2013, 08:21 AM #8
    armandnel's Avatar
    armandnel
    armandnel is offline Fossicker
    Join Date
    Jul 2010
    Location
    QLD, Central Highlands.
    Posts
    48
    Total Downloaded
    0
    Quote Originally Posted by Graeme View Post
    A quick squirt from an air hose will move it. As its operated by pressure from the turbo outlet which normally maxes at just over 20 psi, don't give it too much of a blast.
    So I put the trusty ARB compressor on the actuator and the pushrods seems to be moving just fine. In fact it doesn't take much pressuro to move it so it seems to be working fine?!
    What's next? Diesel pump? (Dare I say that word?)
    Reply With Quote Reply With Quote
  9. 19th December 2013, 09:24 AM #9
    BIG O
    BIG O is offline Master
    Join Date
    Dec 2010
    Location
    Brisbane Bayside
    Posts
    361
    Total Downloaded
    0
    Change the fuel filter ?
    Reply With Quote Reply With Quote
  10. 19th December 2013, 09:38 AM #10
    armandnel's Avatar
    armandnel
    armandnel is offline Fossicker
    Join Date
    Jul 2010
    Location
    QLD, Central Highlands.
    Posts
    48
    Total Downloaded
    0
    Quote Originally Posted by BIG O View Post
    Change the fuel filter ?
    I'm in the process of doing a service now. I'll change the filters and hopefully that could be the fault.

    Fingers crossed.
    Reply With Quote Reply With Quote
Page 1 of 2 12 LastLast
« Really weird problem with my D2 Jack | ATF leak at cooler pipe to bottom of auto connection »

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules

Search AULRO.com ONLY!
 Search All the Web!