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Thread: can anyone tell me what this unit?

  
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    northants astra's Avatar
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    can anyone tell me what this unit?



    it seems to be attached to the underside of the fuel filler neck on my girlfriends astra g convertible, and seems to be making a whimpering noise, sounding similar to blowing over the top of a bottle, when pulling away from a standstill intermittently. Any help would be greatly appreciated.

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    mikesmith2's Avatar
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    Could it be a fuel return or a fuel tank breather?

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    it is part of the enclosed fuel tank filler/breather system that ultimately connects with the charcoal cannister and purge valve system

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    does this unit act as a vent?

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    would this unit make a noise?

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    sort of a vent, it also locks off petrol from spilling should the car overturn in an accident. i have never heard a noise from mine, so not sure if there should be any noise from them

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    oh right, well as said in my original post, the car makes like a whimpering noise seeming to come from the right rear and this unit was the only thing i could find in the vacinity, could this be the culprit? thanks

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    could be and it might be that the charcoal filter that is part of the system may be getting blocked up, as i say i have never heard a noise from one of these.

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