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Im Sh***ng myself

Discussion in 'A3/S3 Forum (8L Chassis)' started by Trick, Jun 24, 2009.

?

Whats Wrong?

  1. Coil Pack

    40.0%
  2. MAF

    20.0%
  3. N75

    0 vote(s)
    0.0%
  4. Ignition Amplifier

    0 vote(s)
    0.0%
  5. Crank Sensor

    40.0%
  1. Trick
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    Trick Member

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    [Jun 24, 2009]
    Need a bit of advice please chaps.

    Driving to work this morn and aproched a roundabout and the car just konked out! restarted and car took approx 3sec of turnover before it started. Once it did however the epc light came on and now stays on after every restart (is this limp mode?), i also idle now at 1k rpm and when driving along the car seems to be going then as if its been held back, then going, held back etc.

    A we while back the out of teh blue the car would start after about 5 sec turnover with epc but after restart it was fine. (this happend only three times over three days approx)

    I have vagcom but laptop screen has given up so i have been unable to test. IF IF i make it home, i will borrow afriends laptop to test tonight.

    But what am I facing?:sob:
    #1
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  3. northernlights
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    northernlights A12 Road eater

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    [Jun 24, 2009]
    that sounds like a big problem. where is the connection for the diagnoise lead?
    #2
  4. Trick
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    Trick Member

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    [Jun 24, 2009]
    eh? what in the car? under steering wheel?
    #3
  5. RichA3Turbo
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    RichA3Turbo ...Watching you! Staff Member Moderator

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    [Jun 24, 2009]
    Its probably something minor...if it was a major one, then it wouldnt start at all! just wait and see what vagcom says.
    #4
  6. Trick
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    Trick Member

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    [Jun 24, 2009]
    Ive done a bit of searching and reading, and they all pretty much point towards a faulty coil pack or dirty MAF.
    #5
  7. MintyS3
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    MintyS3 Works 60% the time, Everytime.

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    [Jun 24, 2009]
    Im sure Ive read that the ignition amplifier could cause this? I could be wrong though lol.
    #6
  8. Dani_B19
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    Dani_B19 Audi-sports own special child.

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    [Jun 24, 2009]
    Sounds like coils or maf!
    #7
  9. Trick
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    Trick Member

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    [Jun 24, 2009]
    Might be worth to mention that the car is now due a service and is going to be booked in to Glasgow Audi. So should I leave it to them to sort or sort if before it goes in?
    #8
  10. Dani_B19
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    Dani_B19 Audi-sports own special child.

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    [Jun 24, 2009]
    Well you could really do wi sorting it out before then, isnt exactly ideal driving acar thats cutting out is it!
    #9
  11. S3 HODGE
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    S3 HODGE Brown passenger seat.

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    [Jun 24, 2009]
    My guess is towards the MAF, But im sure the Vagcom will throw a few codes at you if the ESP lights on (which is a good thing) :)
    #10
  12. Trick
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    Trick Member

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    [Jun 24, 2009]
    A good thing!? lol.

    So is it safe to drive the 15 or so miles home from work today?
    #11
  13. The Slug
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    The Slug Active Member VCDS Map User

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    [Jun 24, 2009]
    id say coilpacks / maf myself too
    #12
  14. Dani_B19
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    Dani_B19 Audi-sports own special child.

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    [Jun 24, 2009]
    Well aslong as you prepare yourself for the car to cut out at anytime, aslo try not to thrash it and you should be ok.
    #13
  15. 1animal1
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    1animal1 The Clar!! it mouves!!! VCDS Map User

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    [Jun 24, 2009]
    sounds very much like the crank sensor....vag com showed that cylinder 3 was misfiring but had exactly sdame issues....none of the above would cause the restart issue like the crank sensor would
    #14
  16. 1animal1
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    1animal1 The Clar!! it mouves!!! VCDS Map User

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    [Jun 24, 2009]
    bout £80 for the part, single bolt to fit it, trouble is its an arse to get to (just under oil filter)..... once the nut is off your away
    #15
  17. Trick
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    Trick Member

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    [Jun 24, 2009]
    Since tonight will be the first time of using VAG, (if it works) does it just throw up fault codes with no explanation?
    #16
  18. jojo
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    jojo Looking for Boost! Staff Member Moderator

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    [Jun 24, 2009]
    LOL, no, you need to run a diagnostics scan which should take a few minutes, then it will throw up the fault codes which are called DTCs(Diagnostic Trouble Codes). Then it is up to you to decipher the codes, though most of it is self explanatory
    #17
  19. 1animal1
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    1animal1 The Clar!! it mouves!!! VCDS Map User

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    [Jun 24, 2009]
    you may have to pick out each relevant engine area and do a specific search per module.... my free vagcom wont allow me to do a full search without purchase
    #18
  20. Trick
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    Trick Member

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    [Jun 24, 2009]

    Has no one compiled a list of codes with the relevant possible descriptions of faults?
    #19
  21. 1animal1
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    1animal1 The Clar!! it mouves!!! VCDS Map User

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    [Jun 24, 2009]
    #20
  22. Trick
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    Trick Member

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    [Jun 24, 2009]
    Great, thanks for all the help guys. On a brighter note, went out to try the car at lunch time and it started 1st turn of the key with no epc light. :uhm:
    #21
  23. S3 HODGE
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    S3 HODGE Brown passenger seat.

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    [Jun 24, 2009]
    Id still get it looked at....But if theres no light up then the VAGCOM may not find a fault.
    #22
  24. Trick
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    Trick Member

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    [Jun 24, 2009]
    I will run a diagnose anyway and post the results. Thanxs again!
    #23
  25. Cockney Boy
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    Cockney Boy Member VCDS Map User

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    [Jun 24, 2009]
    My money is on the N75 valves, they have a habbit of sticking. By cycling the ignition noemally resets them, thats why your mangament light went out.

    They are fairly cheap to replace too.
    #24
  26. Trick
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    Trick Member

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    [Jun 24, 2009]
    I should be taking bets here. lol raise the cash for the repair.
    #25
  27. jojo
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    jojo Looking for Boost! Staff Member Moderator

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    [Jun 24, 2009]
    Not if you lose lol. :)
    #26
  28. Trick
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    Trick Member

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    [Jun 24, 2009]
    Ok vagd the car and it aint finding anything, not sure if im even doing it right.

    I have a OBD II Cable and VAG-COM ver. 4091us.

    But the cable was not recognised by vag com as a USB but it was recognised in com port 4? Which I thought was a serial port?

    Is there a guide to how to run the initial setup, and how do you find out which version your car is i.e. HEX, OBD ect. . . .

    Need help plz folks!!! :wtf:
    #27
  29. jimbobery
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    jimbobery S3

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    [Jun 24, 2009]
    Your car is ODBII and the cable sounds like the right one. Also, it's right for it to be refered to as com port 4 (or 1, 2 etc) even if its USB.

    You should go into the settings screen and I think there is a button to test the com port connection.

    Then you can go into the engine module and it should find your car, listing model, engine and some other details. If it doesn't and its timing out with a connection error message try changing the com port in the settings screen.

    I don't understand how it can be your MAF, I thought when these fail they give false readings, but not zero readings. Your can unplug your MAF and the ecu will use base table readings (like set values) and the car will still run ok.

    As above, you may get a misleading error code, or no error codes at all. If so you might need to run some manual tests to check the N75, MAF etc. The thread has a link to a document that details some tests you can do: http://audi-sport.net/vb/showthread.php?t=67011
    #28
  30. golf
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    golf ***** rent boy VCDS Map User

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    [Jun 24, 2009]
    I'll bet it's the crank sensor on the way out. Get it sorted now because it'll gradually get worse.
    #29
  31. Trick
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    Trick Member

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    [Jun 24, 2009]
    this is confusing lol, it sees it as com port 4 and tests ok, but when i go into the engine module and select 8l Audi S3 and hit scan it does show me some info bout engine number or whatever but it runs the scan then finishes with no error messages or fault codes?

    One other thing (prob stupid Q), do i need to have the ignition on/car running etc for this to work?

    Would a HEX-USB+CAN Cabel be better?
    #30
  32. reptor245
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    reptor245 Active Member

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    [Jun 24, 2009]
    Yeah but the N75 J is a real biatch to get hold of. no were has them
    #31
  33. reptor245
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    reptor245 Active Member

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    [Jun 24, 2009]
    You need to turn the ignition on but dont start the car. turn off all aux`s too like fans, radio. ect.
    #32
  34. Trick
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    Trick Member

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    [Jun 24, 2009]
    That's what i done, no radio, fans ect, even closed all doors windows and sunroof, ignition on scanned and nothing. But the epc light wasnt on anymore bofore i ran the scan?
    #33
  35. afcjay
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    afcjay Member

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    [Jun 24, 2009]
    sounds like a coilpack breaking down to me.
    have you not got a spare that you could try swapping over til you find the faulty one?
    #34
  36. 1animal1
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    1animal1 The Clar!! it mouves!!! VCDS Map User

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    [Jun 25, 2009]
    a coil pack or maf will not cause issues on restart, neither will the N75....the car is fine from cold yes? then cuts out when warmed up on run up to roundabouts...... like ive already said along with Golf..... its more than likely your crank sensor..... Golf is spot on, it WILL get to a point where it is undriveable, mine acted up a few times, same symptoms exactly..... holding back on boost, not restarting without a good few turns of the starter motor.....
    #35
  37. Trick
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    Trick Member

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    [Jun 25, 2009]
    Got a couple of misfires on way to work this morning but no engine stalls or lights.
    And yes car is fine from cold. The more i think about it the more im sure it will be a crank sensor, but cant seem to get vag-com to work! :crying:
    #36
  38. 1animal1
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    1animal1 The Clar!! it mouves!!! VCDS Map User

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    [Jun 25, 2009]
    TBH mate vagcom wont tell you if its the crank sensor...... i changed a coil pack with a spare i had, cured it for couple of days then started again.... vagcom showed cylinder 3 misfire and couple other timing faults......cam sensor doesnt seem to be able to be diagnosed

    one other thing, i thought id be a smart arse and buy a pattern part, was sent and looked right with smaller bolt hole, ended up wasting £40 as when i enlarged the bolt hole it still didnt want to play..... best buying OEM
    #37
  39. Bignick
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    Bignick Member

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    [Jun 26, 2009]
    Mine packed up the other day kept stalling without warning then it wouldnt even go when flooring it as a last resort. eventually the battery light came on and it turned out to be the alternator, fortunately i didnt have to replace it as the bushes are changeable in a seperate pack that bolts on £45.
    #38
  40. 1animal1
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    1animal1 The Clar!! it mouves!!! VCDS Map User

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    [Jun 26, 2009]
    why is everyone missing the point about the car stopping and not restarting as it should - when was the last time a coil pack caused a restart issue???
    #39
  41. MintyS3
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    MintyS3 Works 60% the time, Everytime.

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    [Jun 26, 2009]
    Calm down love.
    #40

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