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engine seems to be miss fireing

Discussion in 'A4/S4 forum(B5 Chassis)' started by mike1234, Jun 19, 2007.

  1. mike1234
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    mike1234 New Member

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    [Jun 19, 2007]
    :keule: hi can any one help? i have a 96 audi a41.8t 150 with an amd remap ss exaust straight through cat bypass and samco hoses in plaice the engine seems to missfire when i floor the throttle in the 2-3k rev range the boost gauge is still showing 12-13psi then drops off to 9-10psi my suspissions are that there is a air leak in the turbo pipes some where or the n75 is playin up if it is will it be better to run a n75j valve? all coments apeciated thanks.
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  3. doeboy
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    doeboy Member

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    [Jun 19, 2007]
    No turbo expert here, and I don't know where the tubes are located on the Audi engines but when I went to see a 406 turbo a number of years back you could physically see the tube collapse inwards when the seller stuck his foot down in neutral, try that.

    but then i re-read the Question and realised it wasn't a soft pipe but an air leak! rofl.
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  4. mike1234
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    mike1234 New Member

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    [Jun 20, 2007]
    thanks just stripped all the turbo pipes down and rebuilt all up again the juddering seems to have stopped? one thing i did notice is that the pipe connected to the throttle body from the intercooler has a bit of oil in it is this normal?i have herd that turbos loose a small amount of oil through the bearings can anyone advise thanks
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  5. Biglockie
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    Biglockie Aye you know it makes sense

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    [Jun 20, 2007]
    Mine is the same fella, all you can do is clean it out now and again, take off the Intercooler and clean it out using s solvnet based cleaner, disposing of it responsibly of course.
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  6. mike1234
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    mike1234 New Member

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    [Jun 20, 2007]
    thanks biglockie thats my mind at rest
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