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ECU Repair or Replacement?

Monzta Sep 10, 2019 at 3:15 PM

  1. Monzta

    Monzta Member

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    My local garage has just dropped my car back to me after having had a look at my starting/stalling issue. I thought it was a break in the loom near the ECU but they're convinced the loom is good and that the problem lies with the ECU. They noticed that when the car was running and they tapped on the ECU housing the engine would stutter and/or stall. They think there's probably a dry solder in there that's causing the problem.

    They're not set up for that sort of repair but said I could do any one of three things:

    1. Find someone local who specialises in very fine repairs to PCBs (cheapest option)
    2. Send it off to one of those companies like BBA Reman for professional repair (expensive option)
    3. Buy a secondhand ECU from ebay and have it reprogrammed to my car

    ECUs are cheap on ebay but I have no idea how to go about reprogramming it. I have VCDS-Lite but doubt it's man enough for the job.

    Has anyone got any advice for which direction I should go with this?
     
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  3. QuattroCalum

    QuattroCalum Well-Known Member Saloon saloon Audi A4 Black Edition Manual

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    What engine do you have? I have a spare ECU for BFB engine.

    Sent from my ANE-LX1 using Tapatalk
     
  4. Monzta

    Monzta Member

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    Mine's a 1.9 TDI AVF engine.
     
  5. stevey83

    stevey83 Member

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    BBA Reman i would go for. Have you spoken to them for a quote?
     
  6. Monzta

    Monzta Member

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    I'm waiting for a quote from them.

    I did ask for a quote from another company a bit nearer to me and they said it would be a minimum of £130 plus VAT plus postage.

    In the meantime I've dropped the ECU to a local electrical repair company who are going to look at it under a microscope and re-solder where necessary. Hopefully it'll be ready in the morning.

    I don't want to commit too much money to an ECU just yet as I'm still not 100% certain that it's not the wiring that's the problem.
     
  7. Monzta

    Monzta Member

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    It was some dry solders in the ECU where the loom plugs in. All of them redone for the princely sum of £10 and the car now runs for the first time in six weeks.
     
    QuattroCalum likes this.
  8. stevey83

    stevey83 Member

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    Fingers crossed for you mate! Makes me wonder how much vibration the ECU goes through. Easier than changing the loom though!
     
  9. Monzta

    Monzta Member

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    I really did not relish the idea of swapping out the loom at all. Plus the only compatible loom I could find was in Moscow of all places.
     

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