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  #1  
Old 12-24-2000, 12:39 AM
macavity
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Great forum. My first post. Have a 2001 E-430 with 4k miles. Have noticed a relatively loud humming under rear seat(driver side)with engine running. Sounds like an electric fuel pump. While it's a warranty item..am curious if anyone has any idea on cause before taking it into dealer.
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  #2  
Old 12-24-2000, 04:56 PM
dlswnfrd
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Hummer?

macavity, if you had a '86-'9? and the noise was on the right(passenger side) I would say it was the vacuum pump for the locking system. But in 12 years I've never heard mine.My fuel pumps(yes pumps, my 300E has 2)are on the right side outside underneath in an enclosure. Yes while it is in warrantee have it checked out. Happy Trails Beep Beep from Houston.

Donald
1987 300E 169,000mi.in service 1988
1988 Merkur Scorpio 48,000 mi. in service 1988
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  #3  
Old 12-26-2000, 03:16 PM
ketoj
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Well......I'll be the first to tell you, someone has to

The reason for the humming is......it doesn't know the words!

Sorry, couldn't resist
Jerry
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  #4  
Old 12-26-2000, 04:01 PM
dlswnfrd
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One borne everyday

I don't know the words either so I'll just tap to the tempo. Dats ah oneah twoah and the bubbles rose. Happy Trails and New Year Beep Beep from the dunce in Houston.

Donald.
dats tree anda foh anda fifer and I'm all taped out.
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  #5  
Old 12-26-2000, 04:58 PM
Tom
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I have MY2001 E55 and I also have noise under rear seat that cycles every 1 second or so. Was told by dealer,after they heard it, that it is vacume pump. I have appointment to fix along with front bummer broken on racoon.
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  #6  
Old 12-26-2000, 09:54 PM
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Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Yes there is a pneumatic pump under the seat, shouldn't run unless the is a bleed from the lumbar seats or the engine isn't running. Then it provides vacuum assist. Also runs for central locking.
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  #7  
Old 12-26-2000, 11:30 PM
dlswnfrd
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Not A Second Time

Not again, I said there was a pump and I got a music lesson. Ha Ha not agsain!

Donald
Heck you got me to answer anyway didn't you.
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