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tfsi a bit jerky when cold

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

  1. sliced
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    sliced Drive safe, stay alive.

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    Hi guys my a3 has a bit of a strange problem. When the engine is off cold fully like over night, when you start it up and drive, it is a bit jerky ocassionally, but once the car reaches slightly warmer temperature, near to operating temperature its fine.

    Any ideas what could possibly be causing this? Is it a misfire?

    I've booked in in for a service with audi anyways since the last service was done approx 15k ago, but any ideas?


    2.0TFSI 2009 A3 Manual.


    Cheers.
    #1
  2. T3KT0N1K
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    T3KT0N1K Member

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    Mine's the same. I had it serviced a week ago and it's still like it. It's not a misfire. At least, not for me.

    Does yours have a split second rough start first thing in the morning? Mine does. I think it might be fuel pump related.
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  3. sliced
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    sliced Drive safe, stay alive.

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    Hi,

    nothing rough on startup.
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  4. sliced
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    sliced Drive safe, stay alive.

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    Okay I've decided not to drive it till audi service is which is 3 weeks Way, hopefully that should cure it, if not ill take it from there!
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  5. XFi
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    XFi Member

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    Mines the same, almost misfire like and it doesn't start instantly. Service didn't change anything for me. I think it may be the coking problem with the TFSI engine causing breathing issues.
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  6. sliced
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    sliced Drive safe, stay alive.

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    Ahhh i've got to wait 4 weeks till my service, that was the earliest my local audi had :gun2:

    Doing a bit of research it seems like it could be the spark plugs or coil pack, so going to get them both changed anyways for good measure :)

    Until then poor car will be sitting pretty in the driveway :unsure:
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  7. Bullys3
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    Bullys3 Member

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  8. sliced
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    sliced Drive safe, stay alive.

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    Hi mate I haven't no :( still got 3 weeks and a few days wait till audi take the car in for a full service, I'm hoping its a filter of some sort.
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  9. Bullys3
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    Bullys3 Member

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    My friend has a golf gti and his car does the same said it could be spark plugs or coil packs,
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  10. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep

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    why wouldnt you drive it ?
    just warm it up and drive off then
    is it a derv petrol car details ?
    also does it get up to 90 on the temp and stay there ?
    #10
  11. Bullys3
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    Bullys3 Member

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    Mine just has a **** start first thing in a morning other than that its fine, it's an 2007 s3
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  12. sliced
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    sliced Drive safe, stay alive.

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    Hi,
    don't wish to make it any worse, plus don't really need to drive till uni starts again ~end of sept
    Its a petrol 2.0tfsi 2009
    Yep it gets to 90 fine and stays there
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  13. sliced
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    sliced Drive safe, stay alive.

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    Cheers will look more thoroughly into this
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  14. S3_Jacko
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    S3_Jacko Well-Known Member

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    More than likely spark plugs mate... My 2.0tfsi had this aswell, but mine was also losing power on long motorway journeys, that was down to a slightly faulty maf sensor... could be spark plugs, maf sensor, or divertor valve.... all easily changable for the home mechanic, start with the cheapest option 1st and see how you go!

    Good luck :)
    #14
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  15. Tomwebb
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    Tomwebb A3 2.0 tdi s line 170

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    My tdi does the same thing, had to start it twice before it actually started. Only when it's cold though.
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  16. Bullys3
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    Bullys3 Member

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    That's why I mentioned the plugs and coil packs as they would be the cheapest to change before it gets expensive, ill probably change mine first see how it goes
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  17. Sevv
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    Sevv Pushing the limits..

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  18. Bullys3
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    Bullys3 Member

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    Ok thanks but ill leave that to the mechanics I'm an engineer but don't touch my cars incase something goes wrong
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  19. sliced
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    sliced Drive safe, stay alive.

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    lol I really don't trust myself with trying to do stuff cars, Tried changing a sidelight on my mk5, ended up falling in the headlamp and left it like that when i sold it :$
    [​IMG]
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  20. NME
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    NME Member

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    Pretty sure there is a recall on faulty coil packs with Audi - I got mine replaced for free by Audi for free which was also a 2007 S3.

    Before anyone spends any more money on replacing the coil packs, give Audi a call!
    #20
  21. Bullys3
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    Bullys3 Member

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    Ill ring them see what they say! Thanks
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  22. Bullys3
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    Bullys3 Member

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    Sliced I get my bulbs done at halfords for £3 I think it saves my breaking the clips getting clusters out!
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  23. Bullys3
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    Bullys3 Member

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    Just rang audi no recalls on the car at all!
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  24. NME
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    NME Member

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    Last edited: Aug 27, 2013
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  25. Bullys3
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    She asked for vin number and said nothing needs doing never said its had anything done
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  26. sliced
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    sliced Drive safe, stay alive.

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    Got local garage to have a quick look.... Engine oil is only at 50%, could this be the reason?? Something so simple?
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  27. bez101
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    bez101 Yorkshire & Humber Rep. Regional Rep

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    no
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  28. sliced
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    sliced Drive safe, stay alive.

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    interim service done by audi, oil and oil filter changed, still a bit jerky, but not as bad as before.

    Changing fuel,pollen,air filters and sparkplugs this weekend, hopefully its one of these things!
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  29. Bullys3
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    Bullys3 Member

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    So it's not gone altogether I think it could be plugs?
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  30. sliced
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    sliced Drive safe, stay alive.

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    its about 80% gone, wicked gonna give spark plugs a try now
    [​IMG]
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  31. Bullys3
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    Did the spark plugs work or is it the same?
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  32. XFi
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    XFi Member

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    Had my spark plug replaced a few months back and it didn't resolve it for me. Think I might try new coil packs.
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  33. sliced
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    sliced Drive safe, stay alive.

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    hi will have to wait till next week to change, currently got another problem with audis service so getting that sorted before I touch the car :)
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  34. sliced
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    sliced Drive safe, stay alive.

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    is there anyway to check the condition of the coil packs ur via vcds?
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  35. _Zerocool_
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    what fuel do you run it on? Just wondered if long term use of 95 would cause any issues?
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  36. sliced
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    sliced Drive safe, stay alive.

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    i usually fill up with v power nitro plus but 95 Ron is fine, but I've only driven this car 300 miles since owning it, no idea what previous owner used to use

    edit: shaking is still as bad when cold, not gone at all, oil change didn't make a difference :(
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  37. sliced
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    sliced Drive safe, stay alive.

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    Okay today I managed to change the fuel filter, pollen filter, air filter, spark plugs and all brake pads and discs. Hopefully its cured, will check on a cold start tomorrow morning and report back!
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  38. Bullys3
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    Bullys3 Member

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    Hope it's better in the morning
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  39. sliced
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    sliced Drive safe, stay alive.

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    Cheers,

    feels much better, only feels juddery when i put it in 5th at 30mph when cold, other than that i think it might be gone:D
    #39
  40. sliced
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    sliced Drive safe, stay alive.

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    Nope not gone, on proper cold weather it is still jerky when its below operating temperature. This is driving me nutssss, any ideas?
    #40

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