At 08:34 PM 10/11/2009, John Meeks wrote...

>I was just wondering why they stopped using them in later vans.
>Is there a reason why I can't keep running with my filter as
>adapter?  Do
>they cause any problems?  It seems to me that filtering the fuel
>before the
>pump is a good thing.

I suspect it's because putting the filter after the pump allows them to
use a better/finer filter.

Upstream, you're limited to <15 psi (atmospheric pressure) differential
across the filter, before which point the pump will cavitate.
Downstream, the differential pressure can be whatever the pump can put
out, minus the regulated pressure (~30 psi).