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Strange vacuum cleaner noise when cold outside

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Bgmick View Drop Down
Tekna
Tekna


Joined: 23áJuná2018
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    Posted: 30áAugá2018 at 7:24am
Good morning all

Bit of a strange one , now the mornings are getting cold 7 degrees here I have noticed if I rev my car even stationary after a 5 min warm up I can hear a noise Luke a quiet vacuum cleaner. The noise goes away when the car is warm. The turbo pulls like it should and no extra smoke etc.

I'm just wondering if this is like a built in technology to by pass the turbo when starting from cold or a secondary air injection set up etc ?

When starting the car on a warm day I don't get it , have heard it a couple of random cold days.

The noise isn't a high pitched siren etc more like there is a small quiet vacuum cleaner.

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Bgmick View Drop Down
Tekna
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bgmick Quote  Post ReplyReply Direct Link To This Post Posted: 30áAugá2018 at 7:29am
Car runs great no roughness or increased fuel consumption
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Bgmick View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bgmick Quote  Post ReplyReply Direct Link To This Post Posted: 30áAugá2018 at 6:17pm
Should clarify it's not a sucking sound it's like the motor sound a vacuum makes
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chrisw99 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote chrisw99 Quote  Post ReplyReply Direct Link To This Post Posted: 31áAugá2018 at 9:12am
Try eliminating some things.  When it's doing it, turn off completely the AC and climate systems, that will rule out the compressor motor, the fans, etc.

If the noise does stop, it's something related to that.

QQ3: 2014 1.2 dig-T ntec+ gunmetal grey
QQ2: 2013 CVT 360 silver
QQ1: 2009 1.5dci n-tec fired iron
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pandjh View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote pandjh Quote  Post ReplyReply Direct Link To This Post Posted: 31áAugá2018 at 12:13pm
Wiper fluid pump stuck on?
LED headlight bulb fans?

Edited by pandjh - 31áAugá2018 at 12:15pm
2015 QQ 1.2 Dig-T N-Tec+, Black
Previously 2009 QQ 1.5dCi Acenta, Black
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Bgmick View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bgmick Quote  Post ReplyReply Direct Link To This Post Posted: 01áSepá2018 at 5:33pm
Nah windscreen pump all good , don't have any led headlamps and turning aircon off and fans doesn't change it.

Was just hoping someone would have said they all do it to a degree and it's some kind of noise due to some fancy thermal dynamics type thing to speed up warming the engine


Still hoping lol to be fair I wouldn't have even noticed if I hadn't had the stereo off
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chrisw99 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote chrisw99 Quote  Post ReplyReply Direct Link To This Post Posted: 03áSepá2018 at 9:42am
Is the noise loud enough to record on a quick video you could post here then we can have a listen?
QQ3: 2014 1.2 dig-T ntec+ gunmetal grey
QQ2: 2013 CVT 360 silver
QQ1: 2009 1.5dci n-tec fired iron
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Bgmick View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bgmick Quote  Post ReplyReply Direct Link To This Post Posted: 03áSepá2018 at 10:47am
Unfortunately not a microphone won't pic it up   I'd imagine anybody else driving it wouldn't notice ...... I only heard it with stereo being off one morning but now can't stop listening for it lol
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