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Air box fan staying on

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by IANF67, May 5, 2014.

  1. IANF67
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    IANF67 Member

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    [May 5, 2014]
    Hi folks
    went out to find my b6 cab as dead as a dead thing this morning, began by attaching jump leads which got it goin but noticed the motor inside the air filter box starting and stopping constantly. I didn't even know it had a fan in there lol. Is there anything I can do. Can I disconnect it? Do I need it working?
    Any help is most welcome
    cheers
    #1
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  3. Greeny233
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    Greeny233 Active Member

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    [May 5, 2014]
    Don't think there is a motor in the air filter box. It is literally a box for the air filter.
    #2
  4. IANF67
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    IANF67 Member

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    [May 5, 2014]
    I could be missing something then but it definitely sounds like a mini hairdryer coming from inside the box
    #3
  5. BlackQuat
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    BlackQuat Well-Known Member VCDS Map User

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    [May 5, 2014]
    Is it petrol? Might have an auxiliary air injection system.
    #4
  6. IANF67
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    IANF67 Member

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    [May 5, 2014]
    Yeah mate it's the 3.0l V6
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  7. BlackQuat
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    BlackQuat Well-Known Member VCDS Map User

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    [May 5, 2014]
    My old Vectra used to have a air injection system that pumped air into the exhaust manifold.
    #6
  8. IANF67
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    IANF67 Member

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    [May 6, 2014]
    Deffo have a fan spinning in the air filter housing. Booked in on Friday morning. Anyone know what it does?? Does it have a relay or a sensor that might be at fault ?

    Cheers
    #7
  9. IANF67
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    IANF67 Member

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    [May 7, 2014]
    Turns out it's the secondary air injection fan. Needed a new relay. It's under the ecu which is under the plastic shroud at bottom of windscreen on the drivers side. Just incase anyone else has the same problem

    Cheers
    #8
  10. BlackQuat
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    BlackQuat Well-Known Member VCDS Map User

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    [May 8, 2014]
    Damn I'm good.
    #9
  11. jbcalvin
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    jbcalvin Member

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    [Jun 8, 2014]
    Is it just petrols that have this or diesels as well...... My car is making the same hair dryer sound intermittently when turned off..... 1.9 tdi
    #10
  12. BlackQuat
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    BlackQuat Well-Known Member VCDS Map User

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    [Jun 8, 2014]
    Pretty sure the diesels don't have it.
    #11

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