[s-cars] Strange Fuel Pump Behaviour

Matthew Russell skippertgore at msn.com
Mon Jun 9 07:13:05 PDT 2008

Brian -

I'm not necessarily convinced that this is a fuel pump problem.
Try loosening your gas cap next time you notice the noise.  If fumes  
and air escape (which it will) and then the noise is gone, it's a tank  
venting issue.

My car makes similar noise, i've been ignoring it for a while now  
(>1yr).  not sure of the long-term effects though!

Matt, CO

On Jun 9, 2008, at 7:27 AM, Brian wrote:

> All,
> Took my '93 S4 out yesterday in 100 degree heat for a cruise.  Car
> battery had died so the night before I charged it up.  After getting  
> to
> my destination, I noticed a slight hum/whine from the trunk when I  
> shut
> it down (lasted about 5 seconds).
> When I got home after pushing the car hard, the hum/whine would not go
> away after I shut the car off.  Opened the trunk, put my hand on the  
> top
> of the fuel pump access plate, and could feel slight vibrations.   
> Pulled
> fuse number 17, no change.
> Here's where it gets a bit weird.  Pulled the negative battery cable  
> (I
> smelled gas fumes and this thing was still whirring) and the STILL
> felt/heard pump noise.  Finally died out after a couple of minutes.
> 3/4 full gas tank, 134K miles, no previous trouble.
> Help!!
> Brian

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