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Audi S3 2001 210 revs stop and turbo increases when accelerating (like clutch slip)

Discussion in 'A3/S3 Forum (8L Chassis)' started by S34ED, Apr 10, 2013.

  1. S34ED
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    S34ED New Member

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    [Apr 10, 2013]
    Hi All,

    My first post in this forum, so thanks in advance to anyone spending their free time helping me out.

    So I just got a late 2001 S3 and am getting to know it. As it's a late 2001, but not quite late enough, it's the 210bhp model (released the month before they changed to 225), even tho I was sold it as a 225 - since discovered from forums that it isn't :(

    I'm not planning on modding it and as far as I know it's standard - I need it to last, as well as being fun, as it's done around 120k miles.

    I've had a V6 4motion golf, a 170GT TDI golf and an Alpha 1.4 multi-air 170bhp (Turbo VVT), so am used to this kind of power, (and turbos on the whole), but the S3 often seems a bit underwhelming in terms of poke.

    Anyway, I think there could be something up with it. It's most noticeable in 5/6th gear when pulling onto the motorway, and accelerating with your foot to the floor but in a high gear, so it the revs increase slowly.

    So what happens is...

    Select a higher gear so the engine isn't revving high. Boot it, and as the car slowly begins to accelerate, you hear the turbo spooling up, and the revs increase slowly as you'd expect. Then something really odd happens. It sounds a bit like the clutch is slipping (but it isn't - I think the turbo revs increase suddenly rather than the engine revs) as the power seems to drop, the rev counter stands still (or perhaps even drops) for a moment, and while the engine revs stay around the same, the turbo revs seem to increase.

    I was wondering if this is symptomatic of a boost leak that only happens at high pressure, or perhaps the diverter valve issue I've been reading about. I also wondered if there was something odd going on with the rev counter/sensor. The car can feel a bit schizophrenic - sometimes it can feel quick, and others a bit gutless.

    As I don't really know what it should feel like (as I've not had the more than a month), but something doesn't feel right.

    I hope I've given you enough info here.

    Any help very much appreciated.

    Thanks

    Ed
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  3. s3dave
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    s3dave TFSI Hybrid Supporter

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    [Apr 10, 2013]
    Hi and welcome, you really need some logging done to see whats happening, where are you? there is a VCDS users list on the forum, or you may want to buy it, as it will be more than useful for sure...
    #2
  4. S34ED
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    S34ED New Member

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    [Apr 10, 2013]
    Thanks Dave - Is VCDS like VAGCOM? I'm in Cheltenham BTW.
    #3
  5. Vex182
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    Vex182 Guess what I drive...

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    [Apr 10, 2013]
    It is the new name for it, best thing is to scan it first.
    #4
  6. S34ED
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    S34ED New Member

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    [Apr 10, 2013]
    #5
  7. S34ED
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    S34ED New Member

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    [Apr 10, 2013]
    Thanks both.

    Messaged bloke on eBay nr Worcester who'll do it for a tenner this weekend - will post up results.
    #6
  8. 16Klappe
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    16Klappe RacecaR forward is RacecaR backwards. Supporter

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    [Apr 11, 2013]
    Boost leak by the sound of it. Check the hoses under the inlet manifold for splits or breaks, get the system smoke tested to be sure.

    Unmapped 210 S3's are a bit underwhelming; at very best they are 145bh/ton which is likely to be less than your Alfa was. So don't try to set the goal posts based on power, go by how the car feels.
    #7
  9. badger5
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    badger5 www.badger5.co.uk Site Sponsor

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    [Apr 11, 2013]
    If you are in Cheltenham, I am in Stonehouse, J13 M5, so if you get stuck and want smoke test, logging, dyno check etc, to confirm whats occuring, give me a call
    regards
    bill
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  10. S34ED
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    S34ED New Member

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    [Jun 1, 2013]
    OK, so I went and got the VCDS thing done, as follows:

    So I rocked-up and he scanned the car:



    Saturday,13,April,2013,14:26:58:53553
    VCDS Version: Release 11.11.5 (x64)
    Data version: 20121222

    Then he reset the codes, we went for a quick blat, and then re-scanned:


    Chassis Type: 8L - Audi A3/S3
    Scan: 01 02 03 08 15 16 17 22 35 37 45 55 56 57 75 76

    VIN: WAUZZZ8L621000577
    -------------------------------------------------------------------------------
    Address 01: Engine Labels: None
    Part No: 8N0 906 018 J
    Component: 1.8L R4/5VT 0004
    Coding: 10710
    Shop #: WSC 66565
    VCID: 387FEF611882BAD8D9C
    WAUZZZ8L621000577 AUZ7Z0A1869420


    No fault code found.
    Readiness: 0010 0101


    -------------------------------------------------------------------------------
    Address 03: ABS Brakes Labels: 8N0-907-379-MK20-E.lbl
    Part No: 8N0 907 379 E
    Component: ESP 20 CAN V005
    Coding: 18448
    Shop #: WSC 01236
    VCID: 3E73F9793AA684E8130


    No fault code found.


    -------------------------------------------------------------------------------
    Address 08: Auto HVAC Labels: Redir Fail!
    Part No: 8L0 820 043 K
    Component: A3 KLIMAAUTOMAT 0105
    Coding: 00041
    Shop #: WSC 01236
    VCID: 306FD741F0F2629891C


    No fault code found.


    -------------------------------------------------------------------------------
    Address 15: Airbags Labels: 8L0-959-655-AI8.lbl
    Part No: 8L0 959 655 J
    Component: Airbag Front+Seite 5008
    Coding: 01104
    Shop #: WSC 01236
    VCID: 458196955F70D73052A


    No fault code found.


    -------------------------------------------------------------------------------
    Address 16: Steering wheel Labels: 4B0-907-487.lbl
    Part No: 4B0 907 487 C
    Component: Lenkradelektronik D01
    Coding: 01002
    Shop #: WSC 01236
    VCID: 2C57C331DCDA0678AD4


    No fault code found.


    -------------------------------------------------------------------------------
    Address 17: Instruments Labels: 8L0-920-xxx-17.lbl
    Part No: 8L0 920 980 R
    Component: KOMBI+WEGFAHRS. VDO D07
    Coding: 01444
    Shop #: WSC 00000
    VCID: 428B8D894E5EE008778
    WAUZZZ8L621000577 AUZ7Z0A1869420


    No fault code found.


    -------------------------------------------------------------------------------
    Address 22: AWD Labels: 02D-900-554.lbl
    Part No: 02D 900 554 B
    Component: HALDEX LSC ECC 0006
    VCID: 1F4D24FD9D6CEDE0386


    No fault code found.


    -------------------------------------------------------------------------------
    Address 35: Centr. Locks Labels: 8D0-862-257.lbl
    Part No: 8D0 862 257 E
    Component: CV-Pump, Alarm, RC D17
    Coding: 15178
    Shop #: WSC 00579
    VCID: 2F6DD43DEDCC7D60886


    1 Fault Found:
    01134 - Alarm Horn (H12)
    49-00 - No Communications


    -------------------------------------------------------------------------------
    Address 45: Inter. Monitor Labels: 4B0-951-173.lbl
    Part No: 4B0 951 173
    Component: Innenraumueberw. D03
    Coding: 00001
    Shop #: WSC 00000
    VCID: E0CFE70160921218C1C


    No fault code found.


    -------------------------------------------------------------------------------
    Address 55: Xenon Range Labels: 4B0-907-357-AUT.lbl
    Part No: 4B0 907 357
    Component: LEUCHTWEITEREGLER D004
    Coding: 00014
    Shop #: WSC 01236
    VCID: E5C1F6157FB0773032A


    No fault code found.


    -------------------------------------------------------------------------------
    Address 56: Radio Labels: 8E0-035-1xx-56.lbl
    Part No: 8L0 035 195 H
    Component: symphony II NP2 0005
    Coding: 00005
    Shop #: WSC 01236
    VCID: 3365D84D01E45980ECE


    No fault code found.


    End ---------------------------------------------------------------------


    Doesn't seem to show much really...


    Anyway today I went for a decent drive, and was overtaking a lot down A/B roads - pulling nice and loads of power.

    Then, on the way back, no turbo at all... just completely gutless. Engine runs perfectly, but there is no boost and you can't hear the turbo spinning-up.

    Could it be an N75 valve perhaps? Could this have been the issue all along?

    Anyone else had similar symptoms before their N75 went?
    #9

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