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Flickering Rev-Needle on Idle

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

  1. Wizza

    Wizza BÜBENGRÖPEN

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    This happens when both car is cold and warm but much more noticable when cold.

    Obviously the car starts as normal and revs to around 1200rpm but as it gradually drops the needle flickers between 700revs and 900revs - BUT - there seems to be no fluctuation in engine noise.

    Anyone any ideas and what exactly can cause this?
     
  2. Wizza

    Wizza BÜBENGRÖPEN

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    Any ideas please?
     
  3. Tim_Attard

    Tim_Attard Active Member

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    vac leak or maf would be my input
     
  4. Scullies

    Scullies Well-Known Member

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    Yeah, me too. Try unplugging the maf and see how it idles.
    also worth doing a boost/vac leak test.
     
  5. @udi A3

    @udi A3 Site Sponsor
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    no difference to engine tone? just a flikery needle, new cluster hunting time! Any other guages play up at all?
     
  6. Wizza

    Wizza BÜBENGRÖPEN

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    ^^^Some of the leds behind the rev counter look dull... Also the LCD display is missing different lines every day but thats a normal for these cars.

    All other dials do seem fine.

    As regards to the vac leak - it may make sense as on the odd occasion the engine does jerk in low down gear change under slow acceleration.
     

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