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Engine "yawning" after acceleration

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Old 01-25-2004, 11:33 AM
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Default Engine "yawning" after acceleration
When taking the foot away from the accelerator after acceleration at low speeds, the engine sounds like it takes a heavy breathe, a yawning sound. The heavier the acceleration has been, the more powerful the sound is.

Can`t remember to have heard this sound before MTM tuning my TDI from 130 bhp 310 Nm to 176 bhp/400 Nm.

Anyone heard something similar?

03 A4 Avant 1.9 TDI quattro S line 6 speed
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Old 01-25-2004, 11:45 AM
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what time was it at?
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Old 01-25-2004, 11:48 AM
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Immediately after acc, and lasting for 1-2 secs
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Old 01-25-2004, 11:58 AM
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Sounds like time to find more exciting roads.
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Old 01-25-2004, 12:52 PM
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Default lol, I was referring to what time of day, like bed time maybe?? but seriously.
does it sound like a weezing sound? almost sounds like you are describing a bad DV valve...kinda.
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Old 01-25-2004, 01:18 PM
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hooter valve? check vacuum lines and BPV
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Old 01-25-2004, 04:29 PM
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What's NM?
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