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Thread: Td5 sluggish & surging

  1. #11
    Join Date
    Jan 2014
    Location
    Perth Western Australia
    Posts
    1,212
    Have a look at the turbo wastegate.
    disconnect the actuator rod and see if the wastegate opens/shuts smoothly.
    Regards
    Daz


  2. #12
    Join Date
    Oct 2013
    Location
    East Kurrajong, NSW
    Posts
    625
    Well, swapped out the ECU for a Disco unit with the same mild mapping and all the performance issues appear to be gone. Only problem now is the temp gauge seems to have reverse polarity.
    Cheers
    Travelrover

    Adventure before Dementia

    2012 Puma 90 - Black
    1999 Td5 110 Ute - White
    1996 Tdi 300 Wagon - White (the project)

    VKS-737 - Mobile 0972

  3. #13
    Join Date
    Jan 1970
    Location
    cairns
    Posts
    1,637
    Quote Originally Posted by travelrover View Post
    Well, swapped out the ECU for a Disco unit with the same mild mapping and all the performance issues appear to be gone. Only problem now is the temp gauge seems to have reverse polarity.
    Sounds like the ECU has failed.
    The capacitors can fail in the ECU and it usually starts out as the surging/ misfiring symptoms that you have described until a total no go.
    So you were quite lucky not to be stranded somewhere.

    Nanocom diagnostics will show this up as a 'topside switch fault'.

    I carry a pre programmed spare ECU with me on remote trips just for this potential issue.

    Paul.

    77 series3 (sold)
    95 300Tdi Ute (sold)
    2003 XTREME Td5

    I thought I was wrong once, but I was mistaken.

  4. #14
    Join Date
    Oct 2013
    Location
    East Kurrajong, NSW
    Posts
    625
    Quote Originally Posted by harro View Post
    Sounds like the ECU has failed.
    The capacitors can fail in the ECU and it usually starts out as the surging/ misfiring symptoms that you have described until a total no go.
    So you were quite lucky not to be stranded somewhere.

    Nanocom diagnostics will show this up as a 'topside switch fault'.

    I carry a pre programmed spare ECU with me on remote trips just for this potential issue.

    Paul.
    Hi Paul

    I have thought about carrying a spare ECU for some time (many years in fact) so this event hopefully will be the catalyst to part with the hard earned.

    Interesting that no one has suggested this as a possible source of the issue previously :-)

    Cheers - Simon
    Cheers
    Travelrover

    Adventure before Dementia

    2012 Puma 90 - Black
    1999 Td5 110 Ute - White
    1996 Tdi 300 Wagon - White (the project)

    VKS-737 - Mobile 0972

  5. #15
    Join Date
    Nov 2014
    Location
    Nirvana near Albany W.A.
    Posts
    1,349
    Quote Originally Posted by travelrover View Post
    Hi Paul

    I have thought about carrying a spare ECU for some time (many years in fact) so this event hopefully will be the catalyst to part with the hard earned.

    Interesting that no one has suggested this as a possible source of the issue previously :-)

    Cheers - Simon

    If you were about to part with some hard earned it would be very worthwhile to throw some in the direction of a nanocom which would be at the top of my list for remote travel
    You would then have been able to have diagnosed the problem when it first arose. As Harro mentioned it would have probably shown a topside switch fault
    The reason no-one guessed it is because , aside from oil or water ingress they are a very robust ecu and these issues are rare.
    Good you resolved it though.
    you will need a defender ecu for the fuel gauge issue

  6. #16
    Join Date
    Oct 2013
    Location
    East Kurrajong, NSW
    Posts
    625
    The independent guy I have been going to for almost 30 years now was unable to get any meaningful data out of it on a number of occasions over the past four or five years. Anyway I have loan ECU at present and will be replacing with another one next week so I can return the loaner.

    So not sure a Nancom would have provided anything he couldnít see but as I have three defenders it may well be worth the investment. :-)
    Cheers
    Travelrover

    Adventure before Dementia

    2012 Puma 90 - Black
    1999 Td5 110 Ute - White
    1996 Tdi 300 Wagon - White (the project)

    VKS-737 - Mobile 0972

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