I have been reading this thread with interest.  Last Summer, as some of
you may recall, I had a episode of the dreaded buzzing fuel pump in my 84
Westy in the Black Hills of South Dakota.  After having a fuel filter
delivered overnight to the local FLAPS (I now carry a spare!), I swapped
it in at the campground at 8AM while Anne prepared breakfast.

I only mention this because the buzzing occurred after three straight
fillups with a 10% ethanol content gasoline blend.  (It was also HOT out,
temperatures 100+.)  I avoided the ethanol blend gas the rest of the trip
and I had no further buzzing pump episodes during the rest of our journey
back to Maine, and have had no further trouble since.

I stopped using the ethanol blend gas because it seemed the only variable
I could link to the clogged fuel filter.  It was also the hottest part of
our trip, but other days on our journey were just as hot without
incident.  It was, however, the highest elevation we reached during our
travels.

I am not "knocking" the ethanol blend fuel as I can not say that the two
are related in a cause and effect relationship.  A has been related in
this thread, some use it, some avoid it like the plague.  Your "mileage"
may vary.

So I pose the question:

Is it possible that the use of an ethanol blend gas on three successive
fillups loosened up some crud in my tank and clogged up my fuel filter?
Or are these symptoms unrelated to each other?

Best wishes,

Tony

Anthony L. Mourkas
Hampden, Maine, USA
1984 Vanagon Westfalia
1991 Jetta Eco Diesel
1991 Volvo 240 sedan (for sale)