Sounds like a classic fuel filter problem. I'd start with a new fuel filter
and if that doesn't do it, have the fuel pump checked out. Worst case is
that your gas tank is rusty and debris is clogging the inlet. But it's
probably just a dirty old fuel filter.

-Mark McCulley

At 12:00 PM 3/13/98 -0600, Linda Barry wrote:
>I  have a problem with my 1985 Vanagon camper.  It usually occurs on long
>trips when the gas is at a quarter tank or lower, but it has also happened
>at the half tank mark.  It usually happens when going up a hill.  What
>happens is I lose the power to accelerate.  When I try to accelarate, a
>violent jerking occurs.  The problem usually goes away after turning off the
>van, only to recur a couple of hours later.  I have explained the problem to
>several mechanics, but they haven't found the cause.  Has anyone experienced
>a similar problem and know what causes it?
>
>Thanks,
>
>Linda Barry
>