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Rev's bouncing + very poor mpgs

Discussion in 'A3/S3 Forum (8L Chassis)' started by JamieG, Nov 5, 2008.

  1. JamieG
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    JamieG New Member

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    [Nov 5, 2008]
    Hi can anyone help me with my A3 1.8T Quattro that has the following issues.


    My car is bouncing around when idling, it's not bouncing much but the needle is moving up & down & I can feel a judder in the car, this is whilst sitting still.

    When driving along normally if I'm stopping I put the clutch down and the rev's drop to 500 then quickly go back to slightly over 700 again, just over 700rpm is normal, this is also the case if I start the car when it's warm, when cold it's ok but I guess thats the auto choke, however when first pulling away for the first few times the car is very sluggish.

    When I change gear I dip the clutch and the car jolts, it's not a smooth as it was, seems very jerky - especially pulling away.

    I do hear a slight rushing of air sound coming from the engine bay, I think from the drivers side but I can't see anything obvious or hear anything with the bonet up, this noise can't be heard when the car is not moving, it only appears whilst the car is accelerating.


    Very poor MPG's, normally I get 32mpg but getting around 26mpg's seems to be peeing fuel, not a cheep habit just now .


    I've tried the following to remedy the issues

    Changed MAF sensor
    Changed Spark Plugs
    Changed Air Filter
    Cleaned Throttle Body Housing + reset ECU
    Oil was low so I've topped up again as this A3 is one of the oil guzzlers
    CTS
    Coil Packs
    DV replacement
    Lambda probe "following some errors on VAG COM"

    I've had a check around the pipes and connections but cant see anything obvious.

    I've run VAG COM tonight which has pulled up some lambda related errors however the lambda was replaced 2-3 months ago and surely can't be the issue - this A3 only has the 1 lambda probe and it's pre cat.


    Chassis Type: 8L - Audi A3/S3
    Scan: 01,02,03,08,15,17,22,35,37,45,54,55,56

    -------------------------------------------------------------------------------
    Address 01: Engine
    Controller: 06A 906 032 R
    Component: 1.8L R4/5VT 0004
    Coding: 05600
    Shop #: WSC 06435
    2 Faults Found:
    17521 - Oxygen (Lambda) Sensor: B1 S1: Internal Resistance too High
    P1113 - 35-00 - -
    16518 - Oxygen (Lambda) Sensor B1 S1: No Activity
    P0134 - 35-10 - - - Intermittent
    Readiness: 0000 0000
    -------------------------------------------------------------------------------
    Address 03: ABS Brakes
    Controller: 1J0 907 379 AG
    Component: ABS/EDS 20 IE CAN V009
    Coding: 13504
    Shop #: WSC 06435
    No fault code found.
    -------------------------------------------------------------------------------
    Address 08: Auto HVAC
    Controller: 8L0 820  ö8
    Note: Excessive Comm Errors
    -------------------------------------------------------------------------------
    Skipping Address 15-Airbags
    -------------------------------------------------------------------------------
    Address 17: Instruments
    Controller: 8L0 920 980 C
    Component: AB-KOMBIINSTR. VDO D11
    Coding: 05444
    Shop #: WSC 00000
    ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ AUZ7Z0Y1469258
    No fault code found.
    -------------------------------------------------------------------------------
    Address 22: AWD
    Controller: 02D 900 554 B
    Component: HALDEX LSC ECC 0006
    No fault code found.
    -------------------------------------------------------------------------------
    Address 35: Centr. Locks
    Controller: 8L0 862 257 P
    Component: CV-Pump, Alarm, RC D13
    Coding: 15210
    Shop #: WSC 00652
    No fault code found.
    -------------------------------------------------------------------------------
    Address 45: Inter. Monitor
    Controller: 4B0 951 173
    Component: Innenraumueberw. D03
    Coding: 00001
    Shop #: WSC 00000
    No fault code found.
    -------------------------------------------------------------------------------
    Address 56: Radio
    Controller: 4B0 035 186 D
    Component: Radio 0001
    Coding: 00207
    Shop #: WSC 06435
    1 Fault Found:
    00852 - Loudspeaker(s): Front
    36-10 - Open Circuit - Intermittent
    End --------------------------------------------------------------------------------------------------


    Any help would be really really appreciated.
    #1
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  3. matt blowen
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    matt blowen Member

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    [Jan 14, 2014]
    Have you cured the problem?
    #2
  4. Lavis89
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    Lavis89 Active Member

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    [Jan 14, 2014]
    Thread revival!

    on a side note, i had this problem recently (after putting a decat on if that makes any difference), didn't change anything, got the car remapped and the problem went away.

    [​IMG]
    #3
  5. matt blowen
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    matt blowen Member

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    [Jan 15, 2014]
    Didnt look at the date lol, i always thought it be worn bushes, i have exactly the same symtoms but no fault codes
    #4
  6. Lavis89
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    Lavis89 Active Member

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    [Jan 15, 2014]
    I didn't have any fault codes either barr one that only came up with vagcom and bill mapped it out, was a bug in the software but kept throwing my car into limp mode
    #5
  7. matt blowen
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    matt blowen Member

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    [Jan 15, 2014]
    Umm i no i have a eprom error, ill have to save up for a remap and see if that sorts it
    #6

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