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  1. #1
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    Unhappy Really in need of help I'm giving up

    I have a a3 1.8t but with the AEB engine not AUM but has
    Ko3s engine must of been replace at some point with the a4 one
    Anyway I'm sorry if I'm doing this wrong but I'm new lol

    Right at between 4k and 6k I'm having stuttering / juddering
    Hesitation
    Had it scanned and brought up a code for cam speed sensor
    Which I then replaced along with new coil packs
    Fuel filter , maf , clutch , flywheel all via Audi
    But the problem persists don't want to spend anymore money
    On it but really love it and would like to go over 4k revs
    Especially on motorway it's so annoying
    Any suggestions please
    Any info will be very appreciated
    Thankyou and sorry if I posted it wrong but I'm new
    Oh and in 1st gear it makes a popping noise under the bonnet at 5k revs

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  3. #2
    voorhees's Avatar
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    I'll move it to the relevant section-A3 8L

  4. #3
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    Thankyou wasn't even sure how to do a post lol

  5. #4
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    Welcome to Audisport Daz!

    Have you changed the plugs??
    3.2 V6 with Custom Code VVT Attack Software


  6. #5
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    Coilpack wiring. Must be misfire. But then that would come up as a fault

  7. #6
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    Plugs / plug gaps / coil pack wiring / fuel pump dying......Dont rule out the coilpacks there could be a dodgy new one...

  8. #7
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    Does sound like it could be fuelling related so maybe fuel pump as suggested, I suspect that wouldn't necessarily throw a fault code unless someone knows different, would the fuel pressure drop and show one perhaps? not sure.

    Has the car always done this or is it new?

  9. #8
    MUSH's Avatar
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    You might have an AEB cylinder head but i doubt very much youll have the block too, totally different design external mounting wise.
    Audi S3 1.9 GT30....




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  10. #9
    s3dave's Avatar
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    True ^^^...

  11. #10
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    Wow thanks for the welcome and speedy help
    I'm gonna change the plugs tomorrow and I have noticed the insulating on some off the wiring has come away so I'll change the wiring too
    How can I check the fuel pump ?
    And does the AEB head fit the AUM block then
    Once again thanks

  12. #11
    s3dave's Avatar
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    You really need to get it logged on VCDS block 118 to see if it is running lean
    All heads are pretty much the same apart from the vvt it was the mounts on the blocks that are different

  13. #12
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    Yes the car is new iv had it for two weeks as I let my a4 go
    Didn't think to ragg it past 4k on a test drive
    But it's a 2001 1.8t with ko3s I only paid 1200
    So want to give it a chance

  14. #13
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    Ok thanks where would I find a vcds block 118

  15. #14
    s3dave's Avatar
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    Vcds is a computer diagnostic programme designed to talk to the car for logs/faults etc readily available from NHN username on here or Ross-Tech: Home

    or where are you there is a list of vcds owners who are usually willing to help http://www.audi-sport.net/vb/vcds-fo...%2A%2A%2A.html
    Last edited by s3dave; 22nd July 2011 at 19:08.

  16. #15
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    Do you have VCDS? It's the fault / diagnosis software from Ross Tech, runs on a PC and connects to car with special cable. Google it up if you're not sure what it's about or have a search of the forum.

  17. #16
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    Ok thanks I'm in south east London unfortunately lol

  18. #17
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    These are the codes a got from my friends
    Snap on solus pro

    17939 / p1531

    16705 / p0321

    Then I changed the cam speed sensor was this right ?

  19. #18
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    I doubt it'll be your fuel pump as you would normally get ' Fuel trim - System too lean' popping up

    Log block 031 which will show lambda values, it'll give you an idea of what your air/fuel ratio is.

    Have those codes come back since changing the sensor??
    3.2 V6 with Custom Code VVT Attack Software


  20. #19
    "Stick a V8 in it!"

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    At a guess, you have a 1 window cam phase wheel , instead of the four window wheel your ECU expects.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
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  21. #20
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    4 window lol I'm lost

  22. #21
    "Stick a V8 in it!"

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    A lot of AEB's have a cam sensor wheel with one hole in it.

    Your AUM should have a 4 window wheel.

    If its still got the one window wheel fitted that will explain the cam sensor error your getting.

    To check it, take the cam sensor off and have a look at the wheel behind do see if it has one slot or four slots.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


  23. #22
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    It has one slot !
    This could explain alot

  24. #23
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    So it has one slot rather than a 4 slot so if I change it to a four slot
    The sensor will gather the right readings correct eliminating all the hesitation
    Problems I have
    I will try new plugs tomorrow and if no change then I'll get a 4 window cam wheel
    Via Audi I guess and that should resolve my problems ?
    I'll keep you all posted and once again thank you so much for all your help
    So really appreciated

  25. #24
    MUSH's Avatar
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    Symptom of someone fitting the AEB head with the single window cam pickup. It needs the 4 window cam pickup to enable the ecu to deliver fully sequential fuel injection. Bet they fitted the head and gave up because they couldnt get it to run right!! Lol

    The bonus from this is that you have a large port head which is beneficial if you want to embark on a little tuning! Is the AUM vvt fitted to the AEB head? If not then youll still get cam timing codes popping up, really this needs retrofitting to the head.
    Audi S3 1.9 GT30....




    ....that is all

  26. #25
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    Lol what a mess, I bet that's what's happened they gave up on it, what is the aum vvt is it the four window wheel
    And how much would the wheel be from Audi roughly

    Once again thankyou

  27. #26
    s3dave's Avatar
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    Nice one aragorn....interesting..

  28. #27
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    Is the 4 window part
    Called a cam phase wheel ?

  29. #28
    "Stick a V8 in it!"

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    Its listed as "impulse rotor"

    AUM expects part number 06B905234A

    Its about 4 quid from the dealer.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
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  30. #29
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    Aragorn you are a god
    So appriciated
    Thankyou

  31. #30
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    Plugs changed and no change lol
    Impulse rotor due in tomorrow so I'll let you
    All know if that was the problem
    Finger crossed

  32. #31
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    Well iv changed the impulse rotor took it out
    Still the same in first other gears are a bit better now but
    Still juddering at 4 1/2 5k rev and can't go past that
    Is it time to give up ?
    Or is there something else it could be
    I'm thinking about getting the AUM head but is it worth it as this problem
    May still be their and it will be more wasted money

  33. #32
    "Stick a V8 in it!"

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    Has the cam sensor fault code gone away now?

    Changing the head wont do anything imo.

    Boost leak test would be a good call. Also logging to see what the MAF, AFR and various other values are doing.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


  34. #33
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    Thanks mate
    The code is still there but MUSH has helped
    And we got to the conclusion that the vvt tensioner is missing
    Well it's got one but it's manual not electric and the conector for it
    Is hanging loose
    Iv found a second hand part for £70 of a BAM head do you know if this will fit / work?
    This must be the cause of miss fire ?

  35. #34
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    The vvt is now changed and still missing / juddering
    How do I do a boost test because my boost gauge holds a 9 while it happens
    And does not go past 5k rpm and sometimes quite lumpy up to it
    With a popping noise between 4-5 k rpm
    Oh and the engine died this afternoon and all lights went off the dash
    But started fine , I just put injector cleaner in to as I'm out off ideas now !

  36. #35
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    Just had it driven by a turbo technician
    And he said I'm getting detonation ??????
    But couldn't tell me more as it's not booked in on their hourly rate I assume .
    Anyone know what could cause detonation before I just scrap this piece of sh*t
    And cut my losses ?

  37. #36
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    Could be detonation..might not be

    Detonation is caused by cylinder temps being to high so the fuel pre ignites which makes cylinder pressures go way above where they should be

    Logging block 031 will show you what your A/F is like, if you are running lean then it could be detonation because you'll be running a lot hotter than what you should
    3.2 V6 with Custom Code VVT Attack Software


  38. #37
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    The popping noise is accullay valve clatter
    Loggin block 031? What's this
    Could it be a temp sensor ?
    Really beginning to hate this car!!!!

  39. #38
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    Could be anything bud, 031 is lambda

    Where abouts are you, there might be someone local who can help
    3.2 V6 with Custom Code VVT Attack Software


  40. #39
    MUSH's Avatar
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    Seriously Daz you need someone with vagcom/vcds to have a look at the car, check codes and maybe log a few block as suggested to get a better picture of it. That is assuming all basic checks have been carried out like timing/plugs/coilpack wiring/all connections checked.
    Audi S3 1.9 GT30....




    ....that is all

  41. #40
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    I'm right on the boarder of Kent / Surrey mate

 

 
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