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Boost... then no boost... Boost... then no boost

Discussion in 'A4/S4 forum(B5 Chassis)' started by Geeman, May 29, 2010.

  1. Geeman
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    Geeman Low Life

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    [May 29, 2010]
    I've got a problem.

    Ran to Gatwick and back this week - 600 miles in total.

    Half way down I seemed to lose boost. Then all of a sudden, I would get (some) boost again. Turbo seemed to pick up if you revved it higher.

    It's really tempromental. One minute I (think I) have it, then the next it feels like I haven't.

    Does anyone know off the top of their heads (before I start ripping things to bits) what could be causing this?

    N75 valve maybe? Loose vaccuum hose?

    Any suggestions welcome!

    Giles
    #1
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  3. Honkers
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    Honkers Member

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    [May 29, 2010]
    I have the same problem as you and I aready have the diverter valves (Forge) and MAF sensor to be fitted. Haven't got round to it yet.
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  4. Gops
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    Gops 6th gear @7000rpm

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    [May 29, 2010]
    MAF?
    #3
  5. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [May 29, 2010]
    I had an intermittant N75 fault that turned out to be a broken cable, could be something like that?
    #4
  6. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [May 29, 2010]
    Given the BBQ i would be tempted to look at N75 connection.

    Have you got VAGcom?
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  7. Geeman
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    Geeman Low Life

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    [May 29, 2010]
    Mark - no VAGcom I'm afraid.

    Will look for loose N75 connections tomorrow. Will swap MAF over as well to see if that makes any difference.

    Cheers chaps.
    #6

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