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Huge dump valve noise on tdi 140 when i release accelerator under 2200 revs in any ge

Discussion in 'A3/S3/Sportback (8P Chassis)' started by TDI140, Apr 18, 2013.

  1. TDI140

    TDI140 Well-Known Member

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    When im driving my 2.0tdi bKD audi a3 and i release the accelerator under 2200 revs to either change gear or brake i get a huge dump valve sort of noise i have checked all my boost hoses and tightened them, i have so oil in the hoses due to fitting catch can plus i had a smoke test done and found no leaks at all the car is pulling perfectly fine and dyno results went up after exhaust bedded in its now running 181 bhp with 309ft lb torque, the car drives perfectly no problems or lag etc etc, just the noise its just worrying me ive been told it could be the EGR being faulty not the hose under it i mean the actual EGR meccanism is this a possiblity ?

    Also has anyone else got this problem and could you shed some loght on it as i dont want the car to be running faulty as vcds detect nothing and ive done everything i can

    thanks
     
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  3. smurfworth

    smurfworth Well-Known Member
    Audi S3

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    The problem is you, your paranoid. Stop worrying, until something drastic happens or it flags something up on vagcom, STOP WORRYING! It's a diesel, they make all sorts of noises, bangs, knocks, rattles, judders but they work, it's not a tight tolerance petrol engine.
     
  4. carl-1968

    carl-1968 A4 sold, lots of bits available, ask for details

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    You should hear mine lol, sound like a jet engine on full throttle, I can post a link if you are interested?
     
  5. tdi-man

    tdi-man Well-Known Member

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    I thought u would of removed egr system by now ? I have a egr valve I took of mine if you need 1 is going about 10 months old. but that does sound like a boost leak to me ,
     
  6. TDI140

    TDI140 Well-Known Member

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    Carl 1968 would be great if you posted link to video,

    my boost gauge also drops boost under heavy load and sits at 26psi but im not sure if thats due to the actuator dumping extra boost pressure,

    where can i get egr delete kit from ? Ive seen allard kits on ebay for around £60 but are they genuine ?

    The thing is i cant find boost leaks and theres no lag unless its my air box leaking as that is an intake boost hose technically as it connects onto the turbo
     
  7. SAiLO

    SAiLO Well-Known Member
    VCDS Map User

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    I had a fluttering noise from the turbo when releasing accelerator like yourself, had to replace it a few months later.
     
  8. Bramley

    Bramley Member

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    Absolutley normal! Mines been like it for 15 months!
     
  9. AidenUK

    AidenUK Well-Known Member

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    Waste gate howl is what you're hearing, all my A3's have done it 05, 55 & 56 plates - 2.0L TDIs, stop worrying.
     
  10. TDI140

    TDI140 Well-Known Member

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    Ive been hearing it for ages i even had intercooler changed due to the boost hose coming off and smashing the intercooler insert clip, i replaced all o seals on hoses, when reving it and releasing accelerator i can see that the intake hose that connects onto the turbo inlet after the maf moves a bit amd thats when the noise occurs could that need replacing ? I hear its quite expensive but if it needs doing ill buy it brand new as i would want a second hand damaged one
     
  11. TDI140

    TDI140 Well-Known Member

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    My noise has been going on for over a year now and i havnt had any EML on the dash or any limp mode etc plus all passengers say it sounds like a petrol dump valve also gets people on the street to turn around and start looking at what it is lol whoch is good but worrying if its a fault
     
  12. sliced

    sliced Drive safe, stay alive.

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    hey mate i get this too on mine! its done 130k though. The sound is amazing i must admit, but seems to go when the cars fully warmed up, i.e done a good 15 miles or so
     
    TDI140 likes this.
  13. chris.vincent3

    chris.vincent3 Own a BMW now, HOWEVER I still own VCDS!
    VCDS Map User

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  14. Mikemc

    Mikemc Scooby Slayer
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    Mine was making the exact noise the other day, its just had new turbo today. It's silent now, but maybe I also had a leak on a pipe which was sorted aswell?
     
  15. TDI140

    TDI140 Well-Known Member

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    Would love to know what pipe it was mate as it could be the same on mine im gonna get smoke test done again but if nothing comes up ill just pretend its not there or put the music up loader lol
     
  16. TDI140

    TDI140 Well-Known Member

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    Could this be the cause of my boost leak / dv noise ? The intake pipe that connects onto the turbo compressor housing looks bent and angles also could be knacked heres a picture
    image.jpg
    image.jpg
    Pictures arnt so good but thats the best i could do lol
     
  17. Icey

    Icey Member

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    did you found out what was wrong matey? I have the same sound coming from the engine soon as I release acceleration
     

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