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Flapping/slapping noise from front end.... Then car goes crazy.

Discussion in 'A3/S3 Forum (8L Chassis)' started by Dani_B19, Aug 5, 2011.

  1. Dani_B19
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    Dani_B19 Audi-sports own special child.

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    [Aug 5, 2011]
    Morning gents.

    Set off to work this morning, all was fine, got up onto the main road thats just been resurfaced, drove along it and noticed that there was a flapping/slapping noise coming from the front end, not massively loud but loud enough to hear, pulled out of a junction and put fot down and the car started to splutter, dump valve was around 0psi mark but was fluttering/flickering, revs were all over the place, pulled over and car was wanting to die. Turned engine off, left it 2 mins and fired back up, all was fine, car fired up and ran smoothly, boosted fine etc.
    Anyone any ideas?
    #1
  2. Syvo
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    Syvo IF IN DOUBT GO FLAT OUT

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    [Aug 5, 2011]
    sounds like limp mode n75 valve possibly
    #2
  3. Dani_B19
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    Dani_B19 Audi-sports own special child.

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    [Aug 5, 2011]
    What about the noise though?
    #3
  4. Syvo
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    Syvo IF IN DOUBT GO FLAT OUT

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    [Aug 5, 2011]
    hmm im a bit unsure with the noise issue.
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  5. s3dave
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    s3dave TFSI Hybrid Supporter

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    [Aug 5, 2011]
    Loose chippings caught in the tread?
    #5
  6. Dani_B19
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    Dani_B19 Audi-sports own special child.

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    [Aug 5, 2011]
    Yeah thats what i thought about the noise but its weird how when i stopped then started again the noise went away! Need to scan it when i get in but its bafflin how chippins can effect it.
    #6
  7. Dani_B19
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    Dani_B19 Audi-sports own special child.

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    [Aug 7, 2011]
    Just to add to this.
    The cars got a loud tapping/clicking noise comig from the back of the engine/exhaust manifold. Any ideas on what t could be?
    #7
  8. Dani_B19
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    Dani_B19 Audi-sports own special child.

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    [Aug 7, 2011]
    Just to add to this.
    The cars got a loud tapping/clicking noise comig from the back of the engine/exhaust manifold. Any ideas on what t could be?
    #8
  9. coatesy
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    coatesy poking badgers with spoons

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    [Aug 7, 2011]
    does this noise happen as soon as the car is turned on or when its been running for about five mins ?
    #9
  10. Dani_B19
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    Dani_B19 Audi-sports own special child.

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    [Aug 7, 2011]
    Tbh ive only noticed it when the cars been running! What you got in mind mate? Cam chain?
    #10
  11. coatesy
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    coatesy poking badgers with spoons

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    [Aug 7, 2011]
    i don't really know mate i know feck all about engines lol but my T sport after its been running for about 5 mins starts to tick. i know this is going to sound strange but i got told that 1.8t engines make like a ticking noise when there not ran on fuel like v power or super unleaded. i think its complete bull tbh.

    you say your ticking is coming from the back ill have to have a listen to mine because i though my noise was coming from the front another stupid thing couldn't it just be the spark plugs working away if its at the back of the engine? again i say i don't have a clue what im on about im just using common sense.
    #11
  12. Y83OLK
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    Y83OLK Hulk Smash!

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    [Aug 7, 2011]
    cracked manifold, turbo housing/ loose egt union?.. does the noise increase in volume/ tempo with engine revs?.
    ..may explain why it goes when cooled down.
    #12
  13. coatesy
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    coatesy poking badgers with spoons

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    [Aug 7, 2011]
    #13
  14. Dani_B19
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    Dani_B19 Audi-sports own special child.

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    [Aug 7, 2011]
    Was thinking cracked manifold, will check the egt probe.

    Coatesy mine does sound like that but louder, ill try to get a video up from the back of the noise.
    #14
  15. Dani_B19
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    Dani_B19 Audi-sports own special child.

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    [Aug 7, 2011]
    Was thinking cracked manifold, will check the egt probe.

    Coatesy mine does sound like that but louder, ill try to get a video up from the back of the noise.
    #15

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