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  #1  
Old 03-09-2012, 09:56 AM
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Rythmic, washing sound on idle

Just took the car out of the garage and let it idle a bit while checking something.. and I hear this rythmic, washing sound from probably the left side. Like a pump pushing some fluid, totally in rythm, interval maybe 2-3 seconds. From inside the cupè.

It first sounded like my head was playing at very low volume, like when you can vaguely hear the snare drum.

Car was cold. Out of time so I couldn't pop the hood but will do this soon. Any ideas? I think maybe the window wash fluid reservoir?
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Old 03-09-2012, 10:19 AM
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Re: Rythmic, washing sound on idle

sometimes my fuel pump makes a noise like that.
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Old 03-09-2012, 10:30 AM
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Re: Rythmic, washing sound on idle

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Originally Posted by 92snowmachine View Post
sometimes my fuel pump makes a noise like that.
Same here.. Kind of like a slushie milkshake coming from the back seat.
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Old 03-09-2012, 10:37 AM
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Re: Rythmic, washing sound on idle

Yeah sounds like fuel pump if you got it from the back seat.

Is it just because the idle is so low? Or because it's cold? Or because you're low on fuel? Or condensates in the fuel? Or nothing to worry about?

Cheers
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Old 03-09-2012, 11:03 AM
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Re: Rythmic, washing sound on idle

i would figure it's nothing to worry about. mine has been doing it for years. it's really intermittent so it's difficult to find the cause but i have theorized that it's the fuel coming out of the return line splashing against the side of the tank and swirling the gas when it's at just the right level.
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Old 03-09-2012, 01:18 PM
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Re: Rythmic, washing sound on idle

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Originally Posted by 92snowmachine View Post
i would figure it's nothing to worry about. mine has been doing it for years. it's really intermittent so it's difficult to find the cause but i have theorized that it's the fuel coming out of the return line splashing against the side of the tank and swirling the gas when it's at just the right level.
Sounds very plausible. And it's perfectly rythmic with said interval?
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Old 03-09-2012, 02:07 PM
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Re: Rythmic, washing sound on idle

basically it sounds like a really quiet side load washing machine on the rinse cycle.
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Old 03-09-2012, 02:19 PM
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Re: Rythmic, washing sound on idle

Yaeh, sounds about right. Thanks.
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