Gina,

      I think mine may be a fouled up injector... Which I haven't
checked yet or my cat?? ...And yes I have for months run INJECTOR
CLEANER EVERY-OTHER TANK FILL. ;0)
But last year when I was having this similar problem ...
I ran the gambit trouble shooting this Van, none of my
instructors wanted to even touch it.  Eventually, I changed the
TEMP2 SENSOR.  WOW instant mileage improvement!!  Doubled the
next fill up.   If you haven't done that I'd certainly give it a
try.  There is an OHM test you can do if you have a multi-meter.
Enclosed it an attachment with more info that may help you,
too...

    Through all my trials with this van I changed the fuel
filter, Plugs, wires, dist.cap & rotor, hose of the AFM.  and the
O2 sensor (twice),
    I CAREFULLY popped the cap off the AFM and sprayed electronic
cleaner on the wiper blade IN the AFM (Which I posted to the
list, I didn't know my van could jump a stop sign like a sports
car and was quite impressed my the results.)
I also sprayed electronic cleaner directly on the throttle
control valve to remove layered gunk that made it's home in the
connections which would not let the spring action respond
properly...
 I added DI-ELECTRIC GEL to all contacts that were either grounds
or connectors, in the engine compartment and in the dash.  I use
a chamois type applicator for electronics.  Regular Q-tips can
work too, but they are abrasive in delicate work.
 Did I mention I had to replace the water pump? ....lol... That's
about it.

    So in fear of missing something obvious I asked the list for
suggestions... :0)
They're a good bunch of people that are willing to help those who
ask...

Well Gina I hope this helps... Debi

Re Gas mileage is Waaaay down,,, LONG!.eml [message/rfc822]