A4 (B6 Platform) Discussion Discussion forum for the B6 Audi A4 produced from 2002-2005

Hissing sound from under the rear part of car

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Old 04-03-2008, 10:01 AM
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Is it hissing with some sputtering sounds mixed in?
Old 04-03-2008, 12:36 PM
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Default Re: Is it hissing with some sputtering sounds mixed in?

It's a very consistent hissing sound. Nothing else.
And it doesn't change as I accelerate or slow down.
Old 04-03-2008, 12:40 PM
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Sounds like a fuel filter/fuel pump to me.
Old 04-03-2008, 12:45 PM
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Default Re: Sounds like a fuel filter/fuel pump to me.

Do you think that is something that need immediate attention?
I mean, assuming that it is the fuel pump, can I still drive the car for a few days before getting fixed?
Old 04-03-2008, 12:49 PM
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Default Usually when the fuel pump is whining it means that either it's about to fail or

the fuel filter is clogged.

There's no way of knowing when it will fail. In my case my fuel pump failed after about 5 minutes of whining. However it is entirely possible for it to last another several weeks/months/years.

If I were you I'd change the fuel filter asap. Usually that solves the problem/noise.
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