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Lost Power and Juddering (Turbo)?

Discussion in 'A3/S3/Sportback (8P Chassis)' started by S3 MRU, Mar 2, 2011.

  1. S3 MRU
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    S3 MRU Member

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    [Mar 2, 2011]
    Okay basically i pulled away from set of traffic lights normally about 15-20mph gaining speed upto 30 not rapidly or anything. And heard a loud pop sound. Initially i thought it was one of the tyres so looked in the driver passenger wing mirrors and saw black smoke behind the car. The car then started juddering and had no power atall. The turbo no longer sounds like its spooling and i can hear a loud gushing sound when i push on the accelerator. The car will judder when i try to pull of and i need to change gear quickly to make it move. No lights on the dash etc. Now with my cars mileage 132k i know the turbo will probably go soon or maybe it may last. I dont rag the car around. But i do know that if the turbo goes the car will not judder just be really sluggish. This leads me to believe that the Car is over fueling causing the black smoke. Could this mean that the Boost hose after the turbo that leads to the Intercooler may have burst causing the car to not receive pressure causing it to judder.

    Where should i be looking first. Thanks people

    NOTE: i dont have VCDS and Audi is 30 miles away. Car isnt driveable to there.
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  3. akash_sky1
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    akash_sky1 Active Member

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    [Mar 2, 2011]
    There's many reasons this could happen but your mileage would be very high for your original turbo to near its last legs
    No boost could be knackered DV, IC or boost pipe come off, blown turbo, VNT vanes stuck...need to get it scanned.

    Black smoke will be overfueling yes but as above could be many reasons there's not enough air getting into the cylinders, but clearly boost related.
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  4. S3 MRU
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    S3 MRU Member

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    [Mar 2, 2011]
    Thanks for the quick reply unfortunately i dont have anyone near me that can scan the car. Audi is too far away and local garages dont have the equipment My brother works for Kwik fit but the master tech there has quit lol so hes taken his diagnostic tools with him.

    How specifically would VCDS tell me where the problem lays being boost related?
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  5. jerrygttdi
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    jerrygttdi Flat oot

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    [Mar 2, 2011]
    have a look under the bonnet and see if any from the turbo to intercooler or intercooler to manifold have come off or split. this would bee my first port of call. sounds the most plausable cause. always start with the easyest route before delving in deeper.:detective2:
    hope its not to terminal:thumbsup:
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  6. TimG
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    TimG Active Member

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    [Mar 2, 2011]
    First thing I'd do if you cant scan it is get you head/ hands in the bay and check the boost pipes are still attached everywhere. I test drove an A3 at a trade place that had a boost pipe come off and it was turboless and juddery, so heres hoping for you its just a pipe!
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  7. S3 MRU
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    S3 MRU Member

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    [Mar 2, 2011]
    How would scanning the car with VCDS tell me if there is a problem with the turbo? How is this possible
    ?
    #6
  8. Lewis583
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    Lewis583 Active Member VCDS Map User

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    [Mar 2, 2011]
    Because you could scan the error memory to see if any DTC's are stored relating to boost pressure and you could also perform a log of the actual values to see if the turbo is creating any boost
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  9. S3 MRU
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    S3 MRU Member

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    [Mar 2, 2011]
    Intresting i wish someone near me had VCDS :(
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  10. S3 MRU
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    S3 MRU Member

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    [Mar 4, 2011]
    Im going to be checking the Boost pipes tomorrow that come from both sides of the intercooler. Is it possible that the one or more of the seals has given way? Realistically could this caus the awful judder? Also when its driven and you put your foot down i can hear a gushing/grinding sound... sounds like air but a bit rough. Any ideas What else i could check tomorrow?
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  11. Sarah's A3
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    Sarah's A3 MODERATOR V6 S3 Hybrid Staff Member Moderator

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    [Mar 4, 2011]
    Have you looked on the map to see if someone is close to you with VCDS?? Think Staz (Leon) has the link in his sig.
    #10
  12. S3 MRU
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    S3 MRU Member

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    [Mar 4, 2011]
    I have yes. And the one person whos kinda close 20miles i have contacted twice with no reply. Everyone else is alot further away. So im pretty screwed :(
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  13. Sarah's A3
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    Sarah's A3 MODERATOR V6 S3 Hybrid Staff Member Moderator

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    [Mar 4, 2011]
    May be worth doing a new thread asking for VCDS help and name your area, someone may work there, worth a shot! Hope you get it sorted. You could always buy a cable from NHN if not, still cheaper than te Dealers and you have it for mods etc.
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  14. S3 MRU
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    S3 MRU Member

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    [Mar 4, 2011]
    Believe me i would buy one if i had the money. Car needs servicing. S3 front needs to go on sline front needs to be sold.

    Turbo problems? Money money money lol Paying off two holidays aswell at the same time so i cant put anything in priority if you know what i mean. the girlfriend is boss.

    My brother works a kwik fit and they have a master tech with diagnostics But he decided to quit last week. W*nker
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  15. FranA3
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    FranA3 events moderator Regional Rep

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    [Mar 4, 2011]
    it sounds like a turbo pipe has come off mk4 golf tdi's were really bad for this kind of thing happening sundden loss of power/turbo and no turbo boost usally means a pipe has come off somewhere it used to happen on my old escort rs load pop no boost = pipe come off the inlet so i would check all the pipes before you go any further it could be something simple
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  16. S3 MRU
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    S3 MRU Member

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    [Mar 4, 2011]
    Okay mate yeah going to jack the car up get under and check all the pipes and also going to buy new seals tomorrow. If that does not fix it then i have no idea :(
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  17. FranA3
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    FranA3 events moderator Regional Rep

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    [Mar 4, 2011]
    the mk4 i think used to pop off at the dv i think maybe worth a check round by there eh
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  18. S3 MRU
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    S3 MRU Member

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    [Mar 4, 2011]
    where is the dv located haha
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  19. FranA3
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    FranA3 events moderator Regional Rep

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    [Mar 5, 2011]
    haha ive got no idea soz mate just check all the pipes i would just to be sure
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  20. NHN
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    NHN Retrofitter - Audi - VW - Skoda - Seat Site Sponsor VCDS Map User

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    [Mar 5, 2011]
    With all due respect mate not having a go, but prioritise, as unless the cars running, spending the dough on service, fitting the S3 front end is pointless as sitting in the drive does look lovely to you & neighbours, but for you a complete waste of money huh, if its not a boost pipe of & you cant find a scanner near you, then use your mods money & buy vcds, it'll be the best purchase you'll ever buy for your car mate :)
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  21. S3 MRU
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    S3 MRU Member

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    [Mar 5, 2011]
    I will be buying from you mate. But im on zero atm. Just had to pay for holiday so got to wait till i have some more funds. Anyhow i took the whole front end apart today to find one of the intercooler boost pipes not connected atall.. So basically it popped off. i replaced all the green seals on on the pipe couplers. But noticed that the metal notches on the pipes where the metal spring clip holds onto have broken away. Poor design? Seeing as they had been serviced at audi before hmmm So basically i thought i would reconnect it with a new seal and made a harness with 5 cable ties on each one to try keep them in place. Put the whole fron end back together took it round the corner. Car drove fine..... Then POP it came off again so it looks like i need a new boost pipe. Audi told me they are 120 pounds each... Sorry but im not paying that for a bit of rubber so anyone know where i can get one cheaper? Cheers guys
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  22. zedzo
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    zedzo Member

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    [Mar 5, 2011]
    scrap yard. or i guess you could make your own pipes using silicone?
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  23. S3 MRU
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    S3 MRU Member

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    [Mar 5, 2011]
    its not the actual pipe its the notches on he metal coupler that clip into the inserts of the intercooler inlets its basically broken apart. Poor design but i can imagine them wearing away under pressure all the time .
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  24. Sarah's A3
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    Sarah's A3 MODERATOR V6 S3 Hybrid Staff Member Moderator

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    [Mar 5, 2011]
    Maybe try ringing TPS, will be cheaper than the Dealers.
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  25. S3 MRU
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    S3 MRU Member

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    [Mar 5, 2011]
    looking at fitting the forge intercooler pipes says they withstand a higher pressure than the OEM look better and no doubt made better too. 120 for one or 150 for all three...

    [​IMG]
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  26. NHN
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    NHN Retrofitter - Audi - VW - Skoda - Seat Site Sponsor VCDS Map User

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    [Mar 6, 2011]
    TBH look on ebay for oem ones, oem ones are fine for what you have, I run oem on a custom map thats running 230bhp with my hybrid turbo, so fair bit more boost than yours mate, without being funny & as for buying vcds of me, wasnt mentioned so I get a sale, was just to do you a favour as truly would be worthy purchase :)
    #25
  27. S3 MRU
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    S3 MRU Member

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    [Mar 6, 2011]
    I know what you mean mate i was just saying about the forge ones as audi quoted 120 for a single pipe when i could get all 3 for 150 had a quick look on ebay and could not find the right pipe. Also i know your an honest guy and its not a push sale just some informative information. I know you want the best for the members on here and i know its a piece of kit that i shoud really invest in. I do intend to but just when funds are a bit more available... Havent got a job anymore mate . Interview monday so who knows
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  28. NHN
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    NHN Retrofitter - Audi - VW - Skoda - Seat Site Sponsor VCDS Map User

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    [Mar 6, 2011]
    Thats a very fair & honest reply & tbh spot on, thanks & yes I see why now, with loss of job which I'm sorry to hear, shelling out few hundred for these things is allot atm huh.
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  29. S3 MRU
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    S3 MRU Member

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    [Mar 6, 2011]
    Yes mate its upsetting really. Seeing all these nice cars wishing mine was on par and having mine in such a bad way. Slowly getting there though. Had to do all the work myself spraying etc. Its tough but atleast after i finish each thing i do i get the satisfaction. Although i wish i could have just bought the car looking how i wanted it to in the beginning. Maybe in the future though. Im learning from everyone on here though so getting quite informative so hopefully i can become quite a usefull member on the forum in some time
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  30. NHN
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    NHN Retrofitter - Audi - VW - Skoda - Seat Site Sponsor VCDS Map User

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    [Mar 6, 2011]
    I like to read what you just wrote about doing the work, having a go yourself is definitely rewarded with pride & just feeling very good about yourself, having learnt something, as we all started somewhere & for me everyday is a school day, learn something new all the time & not always car related.
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  31. S3 MRU
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    S3 MRU Member

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    [Mar 6, 2011]
    Understand what you mean. Nothing better than the feeling of success ;) I will contact you via PM when i have the funds to order vcds i think i need a HEX CAN one for 53 plate 8p?
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  32. NHN
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    NHN Retrofitter - Audi - VW - Skoda - Seat Site Sponsor VCDS Map User

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    [Mar 6, 2011]
    Yeah one I sell is the kiddy.
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  33. FranA3
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    FranA3 events moderator Regional Rep

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    [Mar 6, 2011]
    thought it hsd to be a pipe come off it was a common problem with the mk4 golf tdi's you would have thought that they would have sorted it out by now lol
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  34. S3 MRU
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    S3 MRU Member

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    [Mar 11, 2011]
    Here was the root of the problem

    [​IMG]

    Poorly designed pressed metal notches that fall to bits over time under pressure. Maybe because audi did not fit it correctly it had created a bit of room to move and wear .

    So I cut off the bayonet and bought a forge machined coupler pictured against the original here you can see is much better built. I think audi should take a note out of forges book tbh

    [​IMG]
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  35. S3 MRU
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    S3 MRU Member

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    [Mar 11, 2011]
    [​IMG]
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  36. S3 MRU
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    S3 MRU Member

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    [Mar 11, 2011]
    Car is now fixed. Working good as usual. :) Was a slight his on tickover but i guess it took a few mins for the seals to adapt
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  37. FranA3
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    FranA3 events moderator Regional Rep

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    [Mar 11, 2011]
    glad you got it sorted mate got there in the end eh
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  38. tomkellett
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    tomkellett New Member

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    [Mar 21, 2011]
    Hi,
    The same thing happened to me yesterday. I was being a little too enthusiastic with the throttle and pop. I looked under the bonnet and noticed that the intercooler pipe had come out and wouldnt stay in as the nodule had worn away.
    Im driving a 2002 1.9 TDI A3.
    Could you tell me the part number that you ordered?
    Cheers
    #37
  39. NHN
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    NHN Retrofitter - Audi - VW - Skoda - Seat Site Sponsor VCDS Map User

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    [Mar 22, 2011]
    You sure the clip isnt secured properly, as tbh the joints are good if used properly, 1 reason why they wear imho, is if someone hasnt removed them properly by pulling the clip out properly & wedgng the bugger of, this wears the metal down, hence loose.

    You would need to check your vin with audi as different models use different parts sometimes, so to be sure, give audi a bell.
    #38
  40. tomkellett
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    tomkellett New Member

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    [Mar 22, 2011]
    I would assume that it was not put on correctly by one of the garages that has looked at it in the past. It is completely sheered off now so it wont stay in place.
    I measured the worn coupling and have asked Forge if they have the part, so with a bit of luck it will be as simple as cutting of the old piece and replacing with a new coupling.

    One thing that worries me is that while getting the car home, there seems to have been a fair bit of black muck sent onto the engine. Will this affect the running of the engine once its fixed?
    #39
  41. NHN
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    [Mar 22, 2011]
    Black muck, care to expand on that, do you mean from the pipe, probably some oil in the IC which is normal.
    #40

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