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  1. #1
    pi quattro's Avatar
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    Hesitation accelerating 2.0tdi 170 quattro

    Hi any pointers would be welcome and thanks in advance for any suggestions.

    My car seems to hesitate a bit when accelerating gently sometimes. When I push pedal hard it doesn't bother it at all, only when pootling along keeping up with traffic. (pressing pedal lightly) Seems to be happening around 1800-2000 revs. It feels as if there may be a blocked fuel line/filter.

    Fuel filter replace at last service, (very recent) dealer ran fault code but found nothing. Getting concerned as warranty runs out in a few weeks!!

    Trying to tie it up with other circumstances, and it may be linked to the Dpf. It was doing it today and when stationary at lights the engine revved higher than normal(1000) the Dpf light came on a bit later too.

    Hesitation seems to have gone after the light went out(filter regenerated?) but maybe coincidence


    Also any clues how to clean a bit of grit from behind accelerator pedal? A stone got stuck there a few days ago and tried the dyson, but still stuck. I can't see how to "unhook" the pedal. Seems like the grit it at the bottom near the hinge.
    P.s. The hesitation isn't caused by the grit! This only happened the other day

    Cheers
    current -
    07 A3 TDI 170 quattro
    rnse,leather,auto lights & mirrors,bose,sunroof,xenons, etc

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    06 A3 2.0T sportback dsg leather - gone
    06 A3 2.0TDI sport -gone
    01 1.8T GTI -gone
    01 A4 TDI 130 - gone

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  3. #2
    Indie_DSG's Avatar
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    My car does this..
    I had it AMD Mapped and its does it just before the Turbo kicks in around 1800-2000..
    A kind of... Whoa nelly ECU senses a big surge coming any minute.. hold off, hold off... now back in...
    Right annoying...
    Indie DSG

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  4. #3
    pi quattro's Avatar
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    Quote Originally Posted by Indie_DSG View Post
    My car does this..
    I had it AMD Mapped and its does it just before the Turbo kicks in around 1800-2000..
    A kind of... Whoa nelly ECU senses a big surge coming any minute.. hold off, hold off... now back in...
    Right annoying...
    Thanks indie but my engines not remapped
    Its not at all like a big pause and waiting around before a surge, more of a... hesitation! It's only a small blip when just dabbing the pedal to keep up with traffic
    current -
    07 A3 TDI 170 quattro
    rnse,leather,auto lights & mirrors,bose,sunroof,xenons, etc

    previous-
    06 A3 2.0TDI sport quattro - rolled & gone
    06 A3 2.0T sportback dsg leather - gone
    06 A3 2.0TDI sport -gone
    01 1.8T GTI -gone
    01 A4 TDI 130 - gone

  5. #4
    lil_coz's Avatar
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    Quote Originally Posted by Indie_DSG View Post
    My car does this..
    I had it AMD Mapped and its does it just before the Turbo kicks in around 1800-2000..
    A kind of... Whoa nelly ECU senses a big surge coming any minute.. hold off, hold off... now back in...
    Right annoying...
    That's to do with the map itself. When I had mine done, I had exactly the same problem. It was like a dog pulling on a leash in 2nd and 3rd. I rang the company that did mine and they said that they were aware of the problem (it was when the 170 was fairly new so they were still developing the map). They re-called the car, done a few tweaks to the map and it's been fine since. It only does it very rarely now, where as before it was all the time pretty much.
    Coss

    S3 S-tronic: Panther Black, lots of extras, MTM remap


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    Quote Originally Posted by lil_coz View Post
    That's to do with the map itself. When I had mine done, I had exactly the same problem. It was like a dog pulling on a leash in 2nd and 3rd. I rang the company that did mine and they said that they were aware of the problem (it was when the 170 was fairly new so they were still developing the map). They re-called the car, done a few tweaks to the map and it's been fine since. It only does it very rarely now, where as before it was all the time pretty much.

    Know what you mean, its not ALL the time but often whan in slow moving traffic..
    Think I'm goint to bite the bullit and get a Blufin sorted..
    Indie DSG

    ---------------------------------------------------------------
    A3 TDi DSG 170 Bhp S-Line - GOING SOON.....!!!
    A4 TDi DSG 140 Bhp S-Line Wagon - ARRIVING SOON....!!
    ---------------------------------------------------------------
    S3 DSG Pedal For Sale...
    S3 Rear Valance & Diffuser For Sale...
    Cupra Front Splitter BNIB For Sale...
    PM me for details......

  7. #6
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    Hi, I've got a new A3 170 (CR) which did the same thing and i cured it by putting one of the italianspeed boxes on it off ebay. this isnt cranked up to maximum just enough to iron out the flat spot when crawling in heavy traffic

  8. #7
    NITRO

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    Sorry to bring this thread up but i seem to have the same issue. I've currently have the dpf in place and managed to remove the warning light by driving couple of miles holding the rev between 2k - 3k and warning light gone(soon will come on again). So what causes the flat spot between 1800 - 2000 rpm?

    I've also noticed this about the car and happens very rarely, when am stuck in traffic or parked up the car shakes for a while likes its doing sumthing and then boom its fine?

  9. #8
    Sulzer_Mike's Avatar
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    Quote Originally Posted by pi quattro View Post
    My car seems to hesitate a bit when accelerating gently sometimes. When I push pedal hard it doesn't bother it at all, only when pootling along keeping up with traffic. (pressing pedal lightly) Seems to be happening around 1800-2000 revs. It feels as if there may be a blocked fuel line/filter.
    Mine does the exact same thing, my previous A3 which had the 1.9 engine didn't, so it must be an issue related to the 2.0Tdi.
    Audi A3 2.0 Tdi 170 bhp Quattro SE


  10. #9
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    At first i thought it was me the way am driving the car. sulzer_mike does your car feel like the power gets stuck for a split second? Does your car shake for a couple of seconds on idle? It only seems to happen now and again when the cars stationary.

  11. #10
    Sulzer_Mike's Avatar
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    Quote Originally Posted by k9audi View Post
    Does your car shake for a couple of seconds on idle? It only seems to happen now and again when the cars stationary.
    Yes, every now and then it does shake. It feels as if the revs have dipped down to a level where the engine is just about to stall, then it recovers and is fine again. Incidentally mine was in for a major service yesterday and the air filter and fuel filter was changed. It feels significantly quicker now, and as of yet, I have not had any issues with shakes or hesitation between 1800/2000 revs.
    Audi A3 2.0 Tdi 170 bhp Quattro SE


  12. #11
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    Guys, is this an issue relating only to the 170 Quattros?, the reason I ask is that I too used to have a 57 plate 170 Quattro and I was so disappointed with the performance / hesitation of it (32k miles), I have since bought an 09 170 tdi (2WD) and the difference is night and day!, I know the 4WD will have an effect on performance but didn't think so much?
    Last edited by Avus Sportback; 12th November 2011 at 21:37.

  13. #12
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    Mines the 2006 tdi 170pd fwd. I just dont understand why the car shakes now and again and the flat spot. I'll give the fuel filter a change

  14. #13
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    I did notice the car only jerks once for a split moment between 1800 - 2000 revs and then its fine...Maybe it happens when the engine is cold?

  15. #14
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    has it got a vnt turbo? are the veins sticking slightly?
    V8 baby... oh yeah

  16. #15
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    vnt turbo? How do i find that out(sorry if am being dumb)

  17. #16
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    Answer to my own question 170 tdi before 2008 will have the vnt turbo not sure what the new model uses. The question is how hard is it to have the turbo cleaned via innotec turbo cleaner, anyone recommend a garage closer to manchester who knows how to use this stuff Innotec turbo Cleaner, for Volkswagen Audi and all Turbo Diesel Vehicles | eBay

  18. #17
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    Sorry to bring up an oldish thread but i spotted that K9Audi had the exact problem i've just resolved.

    The juddering on idle.. is it usually accompanied by slightly higher revs (1k) If so its the DPF doing a passive regeneration.

    Assuming you are doing a couple of long trips it could be that your DPF has issues or is on its way out.

    This Audi A3 DPF Issues (Case Study) | DPF Issues describes the crap that i went thought with mine, basically a 2nd hand DPF had been welded on.

    Be worth getting it up on a ramp and checking visually yourself and considering a DPF removal.. not cheap though :-/





 

 

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