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Help please!!! I've killed my car. Engine ecu u the swanny!

Discussion in 'A3/S3/Sportback (8P Chassis)' started by scottie123, Nov 7, 2010.

  1. kkp0897

    kkp0897 Active Member

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    Sorry to hear about all the problems Scottie - I don't have much to offer as it seems the responses above as far more technical than I could ever offer. Does anyone know of a good vehicle electrician in your area that could come out and have a look? - AA\RAC Technician? - Bung him a couple of extra quid to have a proper look?
     
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  3. PH1L

    PH1L Gievf Buckets
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    problems sorted already mate, scotties an engineer to trade so is pretty capable anyway
     
  4. mike foster

    mike foster Fossie
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    Can you post the answer to the problem, or ask Scottie to do so please ?

    It will help others if they get in the same situation.

    Thanks
     
  5. PH1L

    PH1L Gievf Buckets
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    it was a connection problem within the wiring of sorts, the piece was replaced and all is well now :)
     
  6. mike foster

    mike foster Fossie
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    Thanks mate - ( which piece? ) presumably a further update will be available so that others can understand what, and what not to do if they wish to do the same mod ?
     
  7. kkp0897

    kkp0897 Active Member

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    Good for him - hopefully with enough time to keep his nads intact....
     
  8. mike foster

    mike foster Fossie
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    :wtf:???
     
  9. Khufu

    Khufu Well-Known Member

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    Ah, its sorted? Good news! Details would be nice LOL
     
  10. PH1L

    PH1L Gievf Buckets
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    it was a simple wiring fix relating to the back emf produced when his relays shutdown true facepalm moment
     
  11. mike foster

    mike foster Fossie
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    Reverse diode required but not fitted ?

    Which part did the back emf knacker ??
     
  12. PH1L

    PH1L Gievf Buckets
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    just frazzled a wire internally unsure of which diode wasnt fitted tbh if it was me id have overlooked it too
     
  13. Khufu

    Khufu Well-Known Member

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    "XXXX laymen's terms, do you speak English?" LOL
     
  14. mike foster

    mike foster Fossie
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    We know which diode wasn't fitted - the one on the relay !

    What we don't know, and what we would all like to know, is precisely what internal communication wire was frazzled because of the relay !

    I thought that all automotive relays had built-in diodes to combat back-emf problems but obviously this is not the case. The voltage on the coil of a 12 volt relay can spike up to 1000v for a milisecond when switching off hence the design requiring a reverse biased diode across the coil connections to short out this voltage.

    We can all imagine what damage that spike can do, albeit for a milisecond, to a computer !
     
  15. N8

    N8 Kowalski Details
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    Whats the latest sorry to hear Scottie.
     
  16. PH1L

    PH1L Gievf Buckets
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    He wasn't using automotive parts for the link it was in the power wire he isn't fitting a conventional led setup either they're from Mercedes all will be revealed in time its not my place to its his car and work. I merely came along to tell you the issue is fixed which I found out when I was in contact giving him wiring diagrams
     
  17. FranA3

    FranA3 events moderator
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    hey scottie did you have any luck getting your car sorted after mate ?
     
  18. scottie123

    scottie123 (●̮̮̃•̃) (●&#
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    Yes mate all sorted now:)I now have some real marmite led dels!
     
    #57 scottie123, Dec 29, 2010
    Last edited: Dec 29, 2010
  19. FranA3

    FranA3 events moderator
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    good stuff mate glad you got it sorted
     
  20. scottie123

    scottie123 (●̮̮̃•̃) (●&#
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    You know how it is fella.molding ain't true Modding unless you break something in the process :)


    [​IMG]
     
    #59 scottie123, Dec 29, 2010
    Last edited: Dec 29, 2010
  21. FranA3

    FranA3 events moderator
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    lol i know what you mean matey ive done it loads of times haha looks good tho
     
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