Loud fuel pump noise
Thread Starter
Pro
Joined: Oct 2006
Posts: 675
Likes: 0
From: Stafford, VA
It seems to be when car is first warming up and while I first start driving.
The car has had 3 owners before me and it maybe aftermarket but it is very loud in behind my head at first.
I can still hear it after it is warmed up.
kerley
The car has had 3 owners before me and it maybe aftermarket but it is very loud in behind my head at first.
I can still hear it after it is warmed up.
kerley
Tech Contributor
Joined: May 2008
Posts: 2,843
Likes: 16
From: Howell Michigan
St. Jude Donor '09-'10-'11
Looking at your profile do you have a C6??? Might want to ask in the C6 section rather then the C5 area.
Melting Slicks
Joined: Nov 2003
Posts: 3,011
Likes: 9
From: Dublin GA
Mine starting making a loud hum/hissing noise right before it went out. The noise is usually a sign of the pump working too hard. If you haven't already, try changing out the fuel filter first and see if that helps.
After that, put a fuel pressure gauge on it and do some test at idle, part throttle and WOT
After that, put a fuel pressure gauge on it and do some test at idle, part throttle and WOT
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Joined: Sep 2003
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From: Longview Texas
Pro
Joined: Mar 2008
Posts: 549
Likes: 22
From: Castle Pines Colorado
I know the exact sound you are talking about. Mine isn't noticeable all the time but I do notice it often. I really notice it when I'm driving really hard through the mountains. I remember going up loveland pass last summer and hearing it sound like a turbo. It is somewhat bothersome but everything I have read said that it is fairly normal.
I'm not an expert though.
I'm not an expert though.
Tech Contributor
Joined: Jan 2007
Posts: 19,422
Likes: 1,146
From: Dyer, IN
