Fuel Pump Bees

[Audi200TQ@aol.com]

December of 1995 I drove my 1990 200 TQ to FL from MA to surprise mom for her
50th.  Left in a snow storm and returned in a snowstorm.  Quattro got me
there in no time flat, but on the way back, like a spark plug died, the more
I gave it gas, the more it slowed.  The car bucked all the way to the next
gas stop.  Turned the car off/then on again and it drove fine all the way
home.  Didnt see the problem again till the mid of June 1996.  I also noticed
the buzzing from the fuel pump that would buzz real high for a little then
back to buzzing low.  I was told it is a fuel pump gone bad.  Dont fuel pumps
just quit? I have been driving like this for quite some time.  Doesnt usually
happen til the car has been run a while.  When I hear the high buzzing, I
simply turn the car off then on again.  I was also told it could be a clogged
fuel filter, how often do I replace these?  I dont go to the dealer anymore
for advice, they charge arms and legs and they always tell me "it" needs to
be replaced.  I could use a little advice... TIA