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How to drive after clearing any engine fault codes? Like you stole it?

Discussion in 'A3/S3 Forum (8L Chassis)' started by S3 Paul, Nov 11, 2011.

  1. S3 Paul
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    S3 Paul Well-Known Member Regional Rep

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    [Nov 11, 2011]
    Bit of a strange one... today i was told that once you clear any fault codes from say the engine section on vag com that the car will be in "learn mode"?
    so if you let your nan drive... the car will almost feel unmapped the first few times you "give it some "
    So the person claimed... drive it hard once you clear the codes for say 20 mins... this way the ecu will strangley realise you drive like a twit and give you full power all the time?

    I dont see any logic in this and dont like driving like a muppet on demand ,
    Could you imagine that "chat" with officer dibble?
    #1
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  3. s3dave
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    s3dave TFSI Hybrid

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    [Nov 11, 2011]
    It does adapt to your driving style, but a quick mad blast would do little i would have thought you will always end up in traffic and it still adapting, I've noticed every time i reset the adaptations it seems livelier , probably because of the slow commute 5 days a week.
    #2
  4. DJ_Troopa
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    DJ_Troopa K1 Driver

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    [Nov 11, 2011]
    I've head this aswell Paul. I also heard the same thing after you do a throttle body reset.
    #3
  5. S3 Paul
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    S3 Paul Well-Known Member Regional Rep

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    [Nov 11, 2011]
    I hope somebody can answer it .
    Full on yes or no,
    I dont want to be doing just because somebody said it would help
    #4
  6. colicabcadam
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    colicabcadam Guest

  7. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Nov 11, 2011]
    ECU is constantly adjusting... it will adapt initially (which is typically the biggest step in adaption) then everytime you drive will checkand adjust if need be...

    <tuffty/>
    #6
  8. Prawn
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    Prawn My other car is a MINI!!!!

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    [Nov 11, 2011]
    it's 100% true, although nowhere near as obvious on me7x as it is on ME3x

    My daily is SLIGHTLY like this, but really not that much, the track car on the other hand, if you cruise all the way to work, then nail it in the last few miles, it's flat as anything. a few miles of giving it the beans and it perks up a treat.


    This isn't just based on the butt dyno, but also seen on the boost guage too, 14-15psi max after a 1 hour motorway cruise, then after 10 minutes of thrashing it see's 17-18psi, sometimes even more
    #7
  9. jojo
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    jojo S3 Drift King! Staff Member Moderator

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    [Nov 11, 2011]
    I think it's more of a throttle map thing that changes, you don't get more power as such, but if you drive fast, the throttle response is quicker to react.
    #8
  10. 16Klappe
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    16Klappe Princess Clap.

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    [Nov 11, 2011]
    You know, every time you say something like that you are totally wrong.

    As Prawn said, this is true. My car does it after a fault code clear it goes like **** and then for the couple of hours whilst I am hooning it (I only fault clear it on a sunday before a drive tbh!) it flys but then on the slow roll home letting it cool down it will not boost if I ask it too. At ADI as well it went really well, I cleared the fault codes after the first session and went for a spin with a couple of people and it was LOADS quicker than it's first track session after an economy drive up there. And when I drive it daily it takes 5/6 spools to be PROPERLY quick which is annoying, but it does help econ' on a daily basis. I'm getting 22.2MPG average at the mo, which is nice.
    #9
  11. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Nov 11, 2011]
    Its more of an issue on DBW cars as they have full control over the throttle, but may also affect the others. The ECU "learns" and adjusts the throttle response curve and boost request depending on how you drive the car.

    What that means though, is that it doesnt matter if you drive it hard immediately after resetting it, if you then pootle around for many miles it will soften everything back off again.
    #10
  12. colicabcadam
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    colicabcadam Guest

    [Nov 11, 2011]
    ok - so what you are saying is if i drive around slowly after clearing fault codes and then decide to do a 0 - 60 sprint, or 60 - 100 sprint, it'll be slower than if i had ragged the car after i cleared the fault codes and attempted it?

    please someone test this theory.......
    #11
  13. A3 T
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    A3 T Lord Of The Rings

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    [Nov 11, 2011]
    A bit off topic but.....


    Has anyone else noticed how good the car feels after you do a throttle body reset in vagcom?
    #12
  14. Prawn
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    Prawn My other car is a MINI!!!!

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    [Nov 11, 2011]
    Yes, absolutely, 100%.

    It's measurable on my track car on the boost guage, drive it softly for an hour and get get 3-4psi LESS boost than when it's being thrashed, it then takes a good 10-15 minutes of thrashing for it to wake up and start boosting properly again

    It's not just a fault code reset thing though, it's constantly learning and adapting
    #13
  15. colicabcadam
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    colicabcadam Guest

    [Nov 11, 2011]
    right, so the fact it adapts ALL the time and not just based on the first 20 minutes means my statement of "load of rubbish" was correct.......

    remmeber the op asked if the first 20 minutes of driving would reflect the cars performance perminatley!
    #14
  16. Prawn
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    Prawn My other car is a MINI!!!!

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    [Nov 11, 2011]
    well, it's not a 'load of rubbish' completely, because how you drive after the first reset will be how it learns initially, and will effect it's power, but you are indeed correct in saying that it won't be a long term thing, as it will adapt over time as you change your driving style
    #15
  17. colicabcadam
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    colicabcadam Guest

    [Nov 11, 2011]
    i was on my iphone when i posted that "load of rubbish" s ocouldnt be bothered to write a long reply lolol
    #16
  18. rhubarb4
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    rhubarb4 Certified Jardo Slayer

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    [Nov 11, 2011]
    Other phones are available lol
    #17
  19. VAG-Slag
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    VAG-Slag Active Member

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    [Nov 12, 2011]
    The point being mate it's probably not a got idea to bowl around making bold statements like this about a subject you obviously know little about. . . Even if you disagree with with something there is most definitely more tactful ways of saying it, i-phone or not
    #18
  20. s3dave
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    s3dave TFSI Hybrid

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    [Nov 12, 2011]
    See post 2..
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  21. 16Klappe
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    16Klappe Princess Clap.

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    [Nov 12, 2011]
    Check the post deletion!
    #20
  22. @unger
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    @unger New Member

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    [Nov 12, 2011]
    I have noticed this too my AUM goes like a t**t after codes are wiped compared to before ! Then sumtimes seems sluggish i thought it was summin wrong but when codes are cleared give it a hammerin and HELLO ! ! !
    #21
  23. @unger
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    @unger New Member

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    [Nov 12, 2011]
    Also obviously at nite cold dense air will make cars run better my A3 goes much much better at nite would i get this performance with a FMIC ????
    #22
  24. ian52
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    ian52 2000 a4 1.8tqs-yellow

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    [Nov 12, 2011]
    So going by my logic if you want your car to perform at its best you need to drive it hard all the time? Happy days.
    #23
  25. Inertiauk
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    Inertiauk Member

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    [Nov 13, 2011]
    Mine is defiantly more perky for a bit after removing the battery for some work and refitting it.
    #24
  26. jojo
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    jojo S3 Drift King! Staff Member Moderator

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    [Nov 13, 2011]
    You guys should try resseting the throttle position adaptation before driving off and see if your car 'feels' quicker!

    DBW cars apply only, insert carkey into the ignition and turn to 'on' position so the dash lights up, but don't start the car. Now fully press the throttle to max for 5 secs, then release it for 5 secs before starting the car up.

    Feel the difference!(most noticeable if you have been driving in traffic or just come off a long run on the motorway!)

    Enjoy. :)
    #25
  27. ian52
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    ian52 2000 a4 1.8tqs-yellow

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    [Nov 13, 2011]
    Think i will give this a go tomorrow.
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