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ML270 ECU fried - after the injector seals was replaced

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by wynanddb, May 8, 2010.

  1. wynanddb

    wynanddb Senior Member

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    Joined:
    Jan 21, 2009
    Location:
    Port Elizabeth, South Africa
    Your Mercedes:
    multiple
    Hi all

    My 2.7 CRD - same engine as the ML270 (OM647 i think) ecu is blown (I know there will be differences in the ecu, but with this scenario I think my questions will be quite generic to common rail diesels and ecu/pcm's)

    I had a case of leaking injectors (black death) and took the vehicle in to a service centre to have the injectors removed, refurbished and the seals replaced, they assured my do this all the time... Any case, week later they contacted me and said they can't get the car started again, my trust in them dissapeared and I had the vehicle dropped off with a flat bed to our local Mercedes Benz/Chrysler dealers.

    They inspected the vehicle and found the ECU to be faulty. A new unit has been ordered and should be installed by Thursday next week.

    Now the question: what could the previous guys have done to damage the ecu? Maybe shorting injector wires? I know the insulation gets very brittle with the whole black death thing.
     
  2. clarkmichigan55b

    clarkmichigan55b Senior Member

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    Joined:
    Jan 3, 2010
    Location:
    sunny Surrey on a sunny day
    Your Mercedes:
    Mercedes 208D T1 van 1989
    Hello,

    A shorting out of the wiring may or may not cause this, if it has been jump started, and caused some sort of power surge. The only other thing that springs to mind is has the ecu been swapped for duff unit. Mercedes should be able to check this with date code, or part number on the unit.

    Just out of intrest have you had an injector changed at the same time as the injector seal was replaced.

    Adrian.
     
  3. OP
    wynanddb

    wynanddb Senior Member

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    Joined:
    Jan 21, 2009
    Location:
    Port Elizabeth, South Africa
    Your Mercedes:
    multiple
    When the injector seals were replaced, they had the injectors cleaned and checked by an independant specialist and returned - no way to be 100% sure it was the original injectors that was returned. The dealers checked them and assured me the injectors is fine.
     

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