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leightonjthomas said:I have the same intermittent noise when travelling at certain speeds. I think it is a vibration from the transparent plastic fascia covering speedo etc. Try pressing it at the corner to see if it stops. Not sure how to stop it permanently though.
me too! Only at certain temperatures thoughleightonjthomas said:I have the same intermittent noise when travelling at certain speeds. I think it is a vibration from the transparent plastic fascia covering speedo etc. Try pressing it at the corner to see if it stops. Not sure how to stop it permanently though.
robc said:Sounds like the N75 (or moo) valve. Mine sounded like a buzzer in the dashboard but it's actually at the top of the engine.
robc said:It regulates the turbo boost by driving the variable vane actuator using vacuum pressure. The ECU requests a certain amount of boost dependent on the demands being placed on the engine and valve manipulates the vanes to make the turbo deliver the required pressure. If the turbo starts to overboost it closes down the turbo to keep the pressure within the tolerances of the engine.
AlanC said:robc said:It regulates the turbo boost by driving the variable vane actuator using vacuum pressure. The ECU requests a certain amount of boost dependent on the demands being placed on the engine and valve manipulates the vanes to make the turbo deliver the required pressure. If the turbo starts to overboost it closes down the turbo to keep the pressure within the tolerances of the engine.
That describes the noise very well. Often wondered what it was. Thanks for the explanation.
Alan
Has anyone experienced a buzzing noise coming from the front dashboard, near the centre (ish) It sounds like a phone vibrating but is only very intermittent and last a few seconds. And no there is no phone in the glovebox or on the dashboard!
Yep, that is the explanation I got yesterday after phoning the VW Commercial place in Aberdeen. The noise has started getting more frequent and lasting longer. The van is a three year old Berhaus with 24000mls on the clock, so just out of warrantee. Didn't get the extended warranty as I thought the £1500/yr was outrageous. Maybe I am beginning to see why it is so expensive. These vehicles are too complicated in my view. Far too much to go wrong. It is still the best purchase I have ever made though!!Sounds like the N75 (or moo) valve. Mine sounded like a buzzer in the dashboard but it's actually at the top of the engine.
Yes I've got that buzzing noise on certain road surfaces from the instrument binnacle. Drives me mad. Will have to get it looked at. Pressing the instrument cluster in various places does stop it temporarily. You can feel the vibration.I have the same intermittent noise when travelling at certain speeds. I think it is a vibration from the transparent plastic fascia covering speedo etc. Try pressing it at the corner to see if it stops. Not sure how to stop it permanently though.
Did you ever manage to stop the vibration behind the instrument panel? I've got the same thingI have the same intermittent noise when travelling at certain speeds. I think it is a vibration from the transparent plastic fascia covering speedo etc. Try pressing it at the corner to see if it stops. Not sure how to stop it permanently though.
I’m afraid the member you are replying to was last seen 4 yrs ago.Yes I've got that buzzing noise on certain road surfaces from the instrument binnacle. Drives me mad. Will have to get it looked at. Pressing the instrument cluster in various places does stop it temporarily. You can feel the vibration.
Did you ever manage to stop the vibration behind the instrument panel? I've got the same thing
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