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Annoying ticking / rattling noise under dash on RS3

chuwey25 May 26, 2016

  1. chuwey25

    chuwey25 Registered User

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    Hi all,

    I posted this in the A3/S3/Sportback section but then realised there was an RS3 section, so here it is again, hopefully in the correct place this time!

    I've recently become the proud owner of a 2011 RS3 and I'm loving it!

    Except for one really really annoying noise that i'm a bit at a loss to locate with my limited knowledge of Audi's..

    It occurs between 800 - 1200 rpm, clears completely above that rpm, is generally louder when cold, and sometimes doesn't do it at all.

    It sounds like a ticking solenoid or rotating type sound (imagine an old fashioned cable driven rev counter!), and it seems to be coming from behind the dashboard (right hand side, drivers side).

    It might even be a vibration caused by the engine rpm at that low idle / fast idle sort of speed - if you hold the revs just right, you can get it to tick to your hearts content - but as I say, go slightly higher on the rpm and the noise clears completely.

    I don't think its coming from the engine bay because it sounds too much like its behind the dash, although I have tried listening to the noise with the bonnet open. I cant really hear it for all the other ticking noises under there though)

    Any suggestions on what to look for would be gratefully received - unknown noises are the bane of my life :)

    Cheers all!
     
    45bvtc likes this.
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  3. NHN

    NHN Retrofitter - Audi - VW - Skoda - Seat Site Sponsor VCDS Map User

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    The tfsi a3/s3 8p ticks as normal, so I wonder if its the same characteristic as that engine.
     
  4. chuwey25

    chuwey25 Registered User

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    Possibly - i'm pretty sure its not coming from the engine itself, perhaps more of a resonant frequency of something under the dash - i'll have to start removing a few dashboard bits to try and get a look up under there I think.
     
  5. mikers4

    mikers4 Registered User

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    I had a heater solenoid replaced for a ticking noise intermittently its behind the centre console kick trim
     
    chuwey25 likes this.
  6. chuwey25

    chuwey25 Registered User

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    Thanks, i'll try and narrow down a bit more where it is as its getting really annoying now! Mine is odd because it is only at tickover or a tad above, and I cant think what system or systems would only be active at tickover. I've tried every heater position and blower position etc but it never seems to make a difference to the noise. I'm waiting to press that one button that stops the noise, but as yet, no luck :)
     
  7. mikers4

    mikers4 Registered User

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    Hi mate if it is that it won't go away no matter what button you push.

    Keep me posted of how you get on
     
  8. chuwey25

    chuwey25 Registered User

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    Will do - do you know if its easily accessible? Any hints on how I can get access to see/feel if that's where it is coming from? :)
     
  9. chuwey25

    chuwey25 Registered User

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    Hi all,

    Just to update anyone interested that I've finally tracked down this most annoying noise!

    It turned out to be the plastic fuel line where it is fed from the front of the car underneath inside the chassis rail - at idle there must be just the right amount of fuel pressure to make it vibrate / resonate, and because of how it was sat in the chassis rail, it resonted through the rail causing a loud tapping noise!

    It does have some foam packing where it exits the back end of the rail that is obviously designed to keep it from touching the rail, but this was slightly squashed over time, and needed a similar one where it enters. With the help of a good friend, we used some sound deadening foam to pack out the hose and prevent the contact and resulting noise!

    Amazing how a small amount of movement from a plastic pipe underneath roughly the drivers seat location gets amplifies into a sound that seemed to be inside the car!

    Cheers

    Garry
     
    45bvtc and leshkin like this.
  10. leshkin

    leshkin Hold my beer... VCDS Map User

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    I've got a 8P S3, but wonder if this is the same thing that has been driving me nuts since I bought the car :) Will take a look at this and see if this is not unique to the RS3 :)
     
    chuwey25 likes this.
  11. chuwey25

    chuwey25 Registered User

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    It would probably be a common route for the fuel hose to run on all models - I'm wondering if there is a revised fuel pipe part number to resolve this problem for professionally than what I've done - I might enquire with my dealer.

    Let me know of this turns out to be your issue too!
     
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  13. leshkin

    leshkin Hold my beer... VCDS Map User

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    Last edited: Oct 16, 2016
  14. JayA3sline

    JayA3sline Active Member VCDS Map User

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    Have you got any pictures to show where this is located?
     
  15. leshkin

    leshkin Hold my beer... VCDS Map User

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    See link to my thread for photos... The S3 and RS3 have the same setup/issue.

    Sent from a mobile device, please forgive typos :)
     

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