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Black box with 6 rubber pipes???

Discussion in 'A3/S3/Sportback (8P Chassis)' started by lifeboatcrew, Apr 7, 2011.

  1. lifeboatcrew

    lifeboatcrew New Member

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    Hi folks, was just away to change glow plugs as my car sometimes goes into limp mode at high speeds. While taking things apart I found a thin black pipe at the back of the engine not connected to anything. Followed the pipe to a black box with 6 other numbered pipes. Can anyone tell me what it is and where does pipe 3 go to???? Thanks!
     
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  3. mike foster

    mike foster Fossie
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    Don't think glow plugs work when the engine is up to temperature mate. Certainly I've never heard of them causing a car to go into limp mode !

    What engine is it and can you post pics of the pipes in question ?
     
  4. lifeboatcrew

    lifeboatcrew New Member

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    Yeah I did think that but it struggles to start in the morning and it did flag up a glow plug error couple weeks back.

    It's A3 2.0 tdi 8p will try n get some pics up if I find out how to!
     
  5. lifeboatcrew

    lifeboatcrew New Member

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  6. mike foster

    mike foster Fossie
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    Think you have to post them to photobucket or something and then post on here!
     
  7. lifeboatcrew

    lifeboatcrew New Member

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    Here's a video! Think it should work




    foster;1221433]Don't think glow plugs work when the engine is up to temperature mate. Certainly I've never heard of them causing a car to go into limp mode !

    What engine is it and can you post pics of the pipes in question ?[/QUOTE]
     
    #6 lifeboatcrew, Apr 7, 2011
    Last edited by a moderator: Aug 15, 2014
  8. lifeboatcrew

    lifeboatcrew New Member

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  9. mike foster

    mike foster Fossie
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    Looks like what is called 'vacuum hoses with connection' that plugs into the solenoid valve block.
     
  10. Lewis583

    Lewis583 Active Member
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    from the video i think that is the pipe that runs down to the actuator on the turbo for the vnt
    [​IMG]
    1 - Mechanical exhaust gas recirculation valve
    2 - Vacuum reservoir
    3 - To vacuum unit for charge pressure control
    4 - To vacuum unit for exhaust gas recirculation cooler change-over
    5 - Solenoid valve block
    6 - Vacuum supply line
    >From tandem pump to solenoid valve block
    7 - Tandem pump
    8 - Air cleaner housing
    >With connection for vent hose
     
    #9 Lewis583, Apr 7, 2011
    Last edited: Apr 7, 2011
  11. lifeboatcrew

    lifeboatcrew New Member

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    Thanks very much guys for your help! Would that pipe being off cause the car to go onto limp mode at high speed?
     
  12. ste

    ste reverse gear

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    hi, that pipe should connect to the actuator on the turbo. it would cause problems at high revs if not connected. you should re-connect it ASAP and try the car
     
  13. Lewis583

    Lewis583 Active Member
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    As said yes it can cause limp mode due to the engine management not being able to regulate turbo speed and therefore boost pressure.
     

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