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Rattle on start up, + fuel economy. S3

Discussion in 'A3/S3/Sportback (8P Chassis)' started by Jkevs, Jul 20, 2013.

  1. Jkevs
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    Jkevs Member

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    [Jul 20, 2013]
    Hi everyone, recently when I start my s3 2008, there a rattle but it goes after a few seconds. Any ideas what it may be?

    Also, what sort of mpg's are people getting?

    Thanks, jack
    #1
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  3. coreythorny
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    coreythorny Member

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    [Jul 20, 2013]
    I'm getting 29-32mpg on A/B roads with a bit of overtaking
    #2
  4. PaulAr
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    PaulAr S3 (8P)

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    [Jul 20, 2013]
    21-22mpg.

    Mostly Town driving.
    #3
  5. Bullys3
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    Bullys3 Member

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    [Jul 20, 2013]
    Between 22-27 mpg mostly town driving but get a good 30-34 on a good run
    #4
  6. big harty
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    big harty Member

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    [Jul 20, 2013]
    Between 22 and 34. But can be as low as 12. But then thats really having some fun
    #5
  7. mjr901
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    mjr901 Parts Manager - (Main Dealer)

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    [Jul 20, 2013]
    I've heard most K04 do this upon start up, from Ed30 to S3.

    I have a rattle on start up too, buts its definitely a heat-shield rattling and its only literally upon turn over and i wouldn't say it lasts for seconds, its probably 1 second and no more.

    If it continues to rattle, perhaps you are starting to have a DMF problem, usually that would stay apparent, and not just last 3 seconds or so, so my money isnt on that, but I wouldn't rule it out judging by age of vehicle and average mileage.

    My average is 24mpg, on a good run AC on, 29mpg +No AC, 33mpg.

    Lowest I've read over a journey is 5.9mpg, the day i picked it up....Picture to prove somewhere deep in my iphone...
    #6
  8. Jkevs
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    Jkevs Member

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    [Jul 20, 2013]
    Thanks for the replies, thanks for the reply regarding the rattle mjr901. Glad it's nothing serious,

    Well alleast we are all around the same, the only reason for me asking was I put my foot down properly for about 12 miles last night and nearly quarter of a tank vanished :giggle
    #7
  9. mjr901
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    mjr901 Parts Manager - (Main Dealer)

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    [Jul 20, 2013]
    Blame it on the evap and heat...
    #8
  10. Patrick_c99
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    Patrick_c99 Member

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    [Jul 20, 2013]
    Could be dmf. My brother has this on his car. Put it in 1st gear with the hand break on and then ease the clutch till it starts to bite. If the rattle gets worse then it is most likely the dmf
    #9
  11. bmh.01
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    bmh.01 Member

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    [Jul 20, 2013]
    How long has it been stood for when it rattles? If they've been stood for several days the oil drains out of the lifters and causes a brief rattle on startup before they pump up.
    #10
  12. S3 03
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    S3 03 Member

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    [Jul 20, 2013]
    i find my air-con makes a funny noise for 3-4 sec on start up, just assumed its pressuring up, then go's. but these engines do seem noisy on tick over.
    #11
  13. mjr901
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    mjr901 Parts Manager - (Main Dealer)

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    [Jul 20, 2013]
    They do have loud injectors, Audi surely could have made these engines sound good.

    It gets worse,

    Ever heard the first start up after an oil service? Now that's an eye opener!!
    #12
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  14. Jkevs
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    Jkevs Member

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    [Jul 21, 2013]
    Only around 5-6 hours, from when I finish work at 4am to when I get up around 11-12 ish,
    #13
  15. grr666
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    grr666 Member

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    [Jul 21, 2013]
    It's very easy to go through a tank of fuel in these if you are giving it some Jack.
    They run on £5 notes really, certainly nothing like your last car.
    Still, I'm happy burning fivers for the fun I have when I do it.
    Just as a point of interest, do you park yours regularly on a slope at all?
    #14
  16. ron burgandy
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    ron burgandy Member

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    [Jul 21, 2013]
    Mine has a rattle on start up and it's going in to audi for a service on Friday and have asked them to have a look at it. I park on a slope could this be causing it
    #15
  17. R34nel
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    R34nel Active Member

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    [Jul 21, 2013]
    The tfsi is great at what it does, it's efficient (ish), powerful and tuneable but it does sound pants from both the front and the back
    #16
  18. grr666
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    grr666 Member

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    [Jul 21, 2013]
    Maybe, I suppose it depends on whether you park nose up or down, I could be talking
    complete garbage but it's a theory I've come up with that oil drains away if you park
    nose up.
    #17
  19. Jkevs
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    Jkevs Member

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    [Jul 22, 2013]
    Yes I do, ever night, it's not a massive slope but its a slope never the less :) going to get audi to give the car a check up before the warranty runs out just to be safe
    #18
  20. Jkevs
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    Jkevs Member

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    [Jul 22, 2013]
    Only now I'm getting into it, i've been mummying it since i've had it but opened the taps a couple if time recently and it certainly does put a smile on my face :)
    #19
  21. Jkevs
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    Jkevs Member

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    [Jul 22, 2013]
    I find the engine has no grunt, I like the sound from the back though :)
    #20
  22. S3Alex
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    S3Alex Rarely neutral

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    [Jul 22, 2013]
    The S3 needs a remap to bring it to life.

    If you remember that the stock engine turns out around 260bhp and has 1500kgs to pull around that's half the answer and then consider that the same engine can turn out 440bhp without an internal rebuild,then you see why it may feel a bit lacking.
    #21
  23. grr666
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    grr666 Member

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    [Jul 22, 2013]
    Compared to what you're used to (and I was used to) no it doesn't.
    The thing is you're comparing chalk with cheese.
    As you know the Fab was pulling as hard as it could from just over 2000rpm
    and as you now know, in stock tune these don't pull their hardest until about
    4000rpm. Just about where the fab was running out of puff these are just getting
    into their stride. It will just take a bit of time to making the adjustment and
    doing all your 'playing' in a higher rev range.
    #22
  24. Jkevs
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    Jkevs Member

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    [Jul 22, 2013]

    As much as I'd love some more power I don't want things to start going wrong :/ I fiddled with my fabia and it just cost me a fortune and went down hill, the only thing I'd like from my s3 is turbo flutter but don't know how to get it, it already makes a blow off noise but I think that's standard is it? :/
    #23
  25. S3Alex
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    S3Alex Rarely neutral

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    [Jul 22, 2013]
    The fluttering noise is when the compressor is run near its limits.

    I think the S3 engine is actually very reliable and up to 360bhp you don't really need to worry.

    A Stg1 remap would give you an extra 50bhp and no added worries.
    #24
  26. grr666
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    grr666 Member

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    [Jul 22, 2013]
    Mine doesn't as far as I can tell?
    #25
  27. Jkevs
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    Jkevs Member

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    [Jul 23, 2013]
    Very similar sound to a dump valve when you lift off? :/ perhaps it's a boost leak and maybe that could explain fuel usage, I think I'll take it into audi for a check up just to be safe.

    So yours doesn't make any sound when you lift off the accelerator?
    #26
  28. Jkevs
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    Jkevs Member

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    [Jul 23, 2013]
    I think it's called turbo chatter valve of something like that. Completely clueless when it comes to petrol engines :/ perhaps a remap could be in the pipeline dm somewhere down the line but leaving the performance standard for now :)
    #27
  29. grr666
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    grr666 Member

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    [Jul 23, 2013]
    No, not that I've noticed, and it has been spanked a fair few times.
    #28
  30. S3Alex
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    S3Alex Rarely neutral

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    [Jul 23, 2013]
    It's called several things but the cause is the same.

    The TFSi isn't like old school turbo engines that whistle and snort so you won't get much of that.
    #29
  31. R34nel
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    R34nel Active Member

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    [Jul 23, 2013]
    I found the s3 pretty rubbish until stage 2+.

    It's fast at the 360 odd bhp mark although I still find it a bit dull and civilised
    #30
  32. S3Alex
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    S3Alex Rarely neutral

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    [Jul 23, 2013]
    You know the answer to that problem.....
    #31
  33. Jkevs
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    Jkevs Member

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    [Jul 23, 2013]
    I had a read through your build thread last night s3alex :) sounds like you've got an absolute monster :)
    #32
  34. S3Alex
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    S3Alex Rarely neutral

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    [Jul 23, 2013]
    Very kind!

    The S3s biggest problem is weight.

    It's 1500kgs and with stock power it's only about 180bhp/tonne.

    We reckon mines about 340bhp/tonne now and hopefully more to come soon.

    My old Escort Cosworth managed that power/weight with only 380bhp.
    #33
  35. Jkevs
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    Jkevs Member

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    [Jul 24, 2013]
    Fair play I'd probably end up in a hedge with that power and banned from driving more than likely, what's your fuel consumption like?

    I'm only 20 and had an absolute tit full of making cars faster already lol so decided to buy a car that's fast enough for me as it is and keep it until I can afford something bigger and better and once insurance prices allow me to. The s3 is ridiculous but just got a temporary policy until I'm 21 and going to see then if it gets any cheaper. -_-

    I think the furthest I'd go with my s3 is possibly a induction kit, depending in extra fuel use to nicer sound/preformance ratio, and maybe a milltek cat back but not sure as I find the s3 engines sound quite **** and don't have any grunt to them, but maybe that's just me :) :thumbup
    #34
  36. S3Alex
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    S3Alex Rarely neutral

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    [Jul 24, 2013]
    Well done for getting one and stumping up the insurance at that age.

    When I think of what I drove back then..... Perhaps best not.

    Mine can do as much as 30mpg on the morning chug into work and much less when pushed but nowhere near the Escort's minimum of 5mpg.

    That's a new efficient turbo Vs an old rally tuned ALS turbo. Lol.

    A Stg1 map plus induction kit will give yours a surprising amount of extra torque and make it a lot easier to drive.

    Before I came here my car was going to remain stock.....that's a tale worth remembering! :)
    #35
  37. Jkevs
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    Jkevs Member

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    [Jul 24, 2013]
    Well I decided to park ex my 200bhp fabia tdi and get something that was faster and standard as the fabia was having a few problems, so I ended up with an s3 but at least with the fabia I could be flat out everywhere and still only use a tank a week :/

    It's dangerous being in forums isn't it ;) gets new ideas into your head and then it's all down hill :D my plan is to drive around in this for a few years and then when I have a tidy job/guaranteed full time job I'll get something a bit nuts and tune it a little :)

    30mpg? I have to drive like an absolute fart to get those stats :( doesn't help with the old lead foot syndrome :giggle.
    #36
  38. S3Alex
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    S3Alex Rarely neutral

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    [Jul 24, 2013]
    Yes definitely dangerous being in forums!

    30mpg is easy enough with the huge amount of torque whereas the stock engine needs a fair amount of revs to achieve the same.

    Equally true that mpg can be awful if you live on the loud pedal but that's increasingly difficult with all the cameras around.
    #37
  39. Jkevs
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    Jkevs Member

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    [Jul 24, 2013]
    I remapped my fabia and everything went wrong from there on, :/ where's best to get an s3 mapped so its reliable and there won't be any chance of anything going wrong?
    #38
  40. S3Alex
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    S3Alex Rarely neutral

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    [Jul 24, 2013]
    The S3 engine is pretty robust and rarely breaks unless you do something daft or don't service things like the cam follower regularly.

    You can never guarantee even a stock engine against failures but very few of us have had real trouble.

    I can only recommend those I actually know or have feedback on and obviously my first choice is going to be AMDTuning in Essex who made my car what it is today.

    They're worth a journey even if they aren't near.

    If you're well up country then there are a number of other people that can provide good feedback on their choices.

    Always go with a company that has been recommended and knows what they're doing.
    #39
  41. grr666
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    grr666 Member

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    [Jul 24, 2013]
    Revo, Shark and APR seem to be favourites.
    Shark have the same reputation here as they do on Brisky.
    Personally I'm looking to have mine done at either APR or Shark.
    You'll break the 300bhp barrier on these with ease with a stage 1 map.
    I think keeping the torque figures sensible is the key to reliability.

    The engine can take loads but the clutch can't.
    Sound familiar? LOL
    #40

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