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Thread: Fluttering type noise

  
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    Fluttering type noise

    As above i am getting a fluttering type noise when driving normaly, sounds a bit like air hitting fan blades. Also when reving slightly and the revs are dropping i can hear a quiet whistling sound but cant make out where its comming from? Does this sound like a boost leak somwhere or is there somthing else no right?
    My car is standard set up apart from a stainless exhaust and veccy air intake.

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    check the vacuum hoses are all on.
    Astra VXR - Arden Blue, Diamond cut 19's, Cruise Control, Debaged, Folding Mirrors, CD70 NAVI and CID + Aux-In, Factory Bluetooth, Piano Black Interior Trim, Full Milltek Unresonated Exhaust

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    How many vacuum hoses are they. Ive checked the ones comming from the boost solanoid on the turbo and they are fine?

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    I get a fluttering noise when the oe dump valve, dumps

    my car is standard spec, to my knowledge


    every now and then I get a propper pssssh most of the time its a flutter
    End of an era - She's gone to a good home

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    there is a vacuum box on the bottom of the intake manifold. these hoses sometimes come of and creates said noise. is it all the time?
    Astra VXR - Arden Blue, Diamond cut 19's, Cruise Control, Debaged, Folding Mirrors, CD70 NAVI and CID + Aux-In, Factory Bluetooth, Piano Black Interior Trim, Full Milltek Unresonated Exhaust

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    Quote Originally Posted by m5dkw82 View Post
    I get a fluttering noise when the oe dump valve, dumps

    my car is standard spec, to my knowledge


    every now and then I get a propper pssssh most of the time its a flutter
    Yeah..i get that too but mine is doing it when its not dumping aswell, like when im just putting a few revs on in normal driving.

    Quote Originally Posted by rizo View Post
    there is a vacuum box on the bottom of the intake manifold. these hoses sometimes come of and creates said noise. is it all the time?
    Im gonna have a look today to see if there is anything loose. It is all the time yes..like i just described it to "m5dkw82"

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    deffinatly a loose vacuum hose. i think there is 2 that go into the box, then the is a boost controler which has 2 or 3 into it. one just below the throttle body left hand side on the inlet manifold.
    Astra VXR - Arden Blue, Diamond cut 19's, Cruise Control, Debaged, Folding Mirrors, CD70 NAVI and CID + Aux-In, Factory Bluetooth, Piano Black Interior Trim, Full Milltek Unresonated Exhaust

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    any chance of a couple of pics of theses said boxes, i think I am going to check mine aswell

    not only do I have a fluttering noise but my boost is different every day, I always blamed the temperature of the air that was being sucked trough the system.
    End of an era - She's gone to a good home

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    Quote Originally Posted by 52Minty View Post
    Yeah..i get that too but mine is doing it when its not dumping aswell, like when im just putting a few revs on in normal driving.
    Please get someone else to confirm, but would this not suggest that your wastegate / dumpvalve is stuck open !
    End of an era - She's gone to a good home

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    I checked all pipes and hoses last night and cant see any that have come loose or that have come off so possibly a split in a hose somewhere or like mentioned the wastegate could be sticking slightly? I did also notice that the alternator is making a slight whiring sound so prehaps ill give that a squirt of WD40 to see if that cures it.
    Any other ideas what could be causing this please?

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