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CLOUDS OF BLACK!

vw754 Dec 24, 2007

  1. vw754

    vw754 vorsprung Durch Technik

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    52 plate a4 tdi 130 sport throwing out heavy clouds of black smoke,so much it cant be driven! Vag-com shows no faults but does show egr is only showing 19.8% . When connected to another a4 it shows 59.9% so i take it egr is failed? changed all filters etc, any other ideas'?
     
  2. Neil_S

    Neil_S Member

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    Have you tried diagnosing by unplugging the vacuum line to the top of the EGR?
     
  3. Turkster

    Turkster Bro.Paul 2.5TDI Quattro Sport

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    try taking the pipe off the valve and dont block it up, see if that stops it, then report back to us.
     
  4. Jason

    Jason Member

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    Problem is that when you start hitting a few tens of thousands of miles the EGR valve get's that caked up with **** (along with all the inlet manifolds) that it usualy sticks full open when warm and never closes properly anyway so disconecting will make no difference!
     
  5. Turkster

    Turkster Bro.Paul 2.5TDI Quattro Sport

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    Take the egr off and clean it, you may find its clogged up,
     
  6. fjtwelve

    fjtwelve Moderator Staff Member Moderator

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    When this happened to me together withe acute lack of performance it was the N75.
     
  7. golisago

    golisago Member

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    Its sounds like you have a boost leak somewhere either coming from the small vacuum pipes too and from the n75 to turbo or pump.........but i would first look for a break in one of the intercooler pipes for a slit or a hose that has popped off.

    Did this on my mk3 golf when i upped the boost and did it a futher million times when i upgraded the turbo x2.
     
  8. Turkster

    Turkster Bro.Paul 2.5TDI Quattro Sport

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    How many miles has the car done ?
     
  9. golisago

    golisago Member

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    F me this site/forum is slow...........i hope your cars perform better than than this.......maybe not!!
     
  10. Turkster

    Turkster Bro.Paul 2.5TDI Quattro Sport

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    sounds like your internet connection could do with an oild change mate, the site works fine for me, :jester:
     
  11. vw754

    vw754 vorsprung Durch Technik

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    Thanks all for your help,car is now sorted.
    It was the egr solenoid valve.
     
  12. Jason

    Jason Member

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    SUPRISE SUPRISE!
     
  13. Turkster

    Turkster Bro.Paul 2.5TDI Quattro Sport

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    Not that old cheesnut :jump:
     
  14. golisago

    golisago Member

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    Yeah right............thats why it takes people a couple of weeks to answer a question around here if your lucky that is.....and you get left in the :cold: .
     

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