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Thread: Whistling CDTI 150

  1. #1
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    Default Whistling CDTI 150

    Hello, I'm new to this forum but am finding it very useful and informative.

    I bought my Vectra 54 reg CDTI 150 (my 5th Vauxhall) last November from local Vauxhall main dealer so it has 1 years Network Q warranty on it.

    I took the car back to them with 2 different noises from the intake system. The first was a deep, whining, almost siren-like noise when cold - they diagnosed a turbo problem and replaced it under the warranty. Result; that noise gone.

    The other noise (which the dealer expected to disappear with the new turbo, but didn't) is a whistle when accelerating - I've seen several threads on here on that subject, but mine doesn't quite match everyone else's! It seems to be related to the position of the throttle pedal. Its not there at very small openings, typically starts at about 2000 rpm and disappears at about 3000 rpm regardless of which gear its in. Pressing the throttle harder and the noise disappears. In higher gears, when the revs don't respond so quickly to the throttle position, I can start the noise by pressing the pedal and it starts before the revs build up.

    Is there something in the intake system which responds to the position of the throttle which could cause this? I can't imagine a split pipe or hose would cause these symptoms.

    Car is going back to the garage on Thursday, but I would be very interested to know if anyone else on here has had a similar experience.

    Thanks, David

  2. #2
    Regular Member ion's Avatar
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    Hi David,

    IMO without hearing it, that sounds perfectly normal!

    When you boot it the vec does whistle noticably as the revs build.

    I loved the noise on mine!

  3. #3
    Regular Member VectraV6CDTi's Avatar
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    Hi mate and to the site

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    Forum Moderator soulman's Avatar
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    Vehicle : Vauxhall

    Trim : Astra Twin Top

    Engine : 1.9cdti

    Year : 07

    Default

    i get a whistling sound in my car too>>>>>>>>>>>>>> may be its just me as i sail past those other cars .................seriously tho yes quite normal to get the turbo whistling ...like Ion i LOVE it

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    Regular Member Dwabo's Avatar
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    aint the 'turbo' supposed to whistle??..

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    Regular Member WHOOSH05's Avatar
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    Yeah mine whistles aswell

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    Regular Member badge25's Avatar
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    Mine sounds like a police car in the morning it whistles that loud.

  8. #8
    Regular Member chrisschild's Avatar
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    Vehicle : Vectra Hatchback

    Trim : SRi

    Engine : 2.2 DTi

    Year : 2003

    Default

    Mine whistles too, I quite like it tbh. (though as another thread I just started) it is due a service.

    I always thought it was perfectly normal for a turbo (especially on a diesel) to whistle too!

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    All turbos whistle. It's the air getting compressed. Mine sounds like a police siren when cold, gets a bit quieter once it warms up.

  10. #10
    Regular Member WHOOSH05's Avatar
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    Quote Originally Posted by _ZS_ View Post
    All turbos whistle. It's the air getting compressed. Mine sounds like a police siren when cold, gets a bit quieter once it warms up.
    Not all turbos whistle. Often a sign of an air leak.

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