Hello Gang!
My '90 GL (Automatic) is giving me troubles. Some may recall this van had
sat for a few years before I came to own it, and I have turned it around to
a reliable  daily driver. Anyway.... It's time to throw more work into it.

I had previously had a problem with the temp gauge never rising above 1/3
on the gauge and it wouldn't make good heat. Of course I had a bad dash
blower, so wasn't all that sure on the heat.
Gas mileage was always bad. 14mpg max.
Well last weekend I finally replaced the thermostat and things were looking
good! The temp gauge would now read right in the middle, and with the new
dash blower as well, i now had heat!
But surprisingly, the gas mileage suffered still.
Yesterday I filled up and found I had gotten 10.5mpg on that tank.

Today I did some highway driving. This bus runs like a champ! Seriously
good power, however I now see that the temp gauge will drop all the way to
the bottom if I cruise at anything above 60mph. Anything below 50mph will
maintain the temp gauge right in the middle, where it should be.
I've never seen this happen. Any ideas?

I believe this weird temperature problem could account in part for my
terrible gas mileage. I recognize that I shouldn't quite be expecting
20mpg, but 17 would be a reasonable thing to find from an auto bus in my
experience. There are a few even in my area that do get 20mpg, easily.

Any thoughts?

-Craig
'90GL
'87 SUNROOF SYNCRO WESTY ZETEC
'85 Barn