[s-cars] Strange Fuel Pump Behaviour

[Brian Armstead]

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