Jon E...
Now I know why you said it was freezing. If you live near Madison, WI. I saw on the TV the 80 vehicle snow delay on the freeway a couple of days ago. When it thaws out, your car will run fine. The blower motor switch fails internally when the contacts arc or the fan resistors open. Its frustrating to get no fan when you need the defrost.
Clarks-Garage
www.Clarks-Garage.com, has a detailed writeup on the DME:
http://clarks-garage.com/shop-manual/fuel-05.htm
Many members carry a spare along for insurance.
Update: here is a suggestion from a man in Milwaukee--cracked solder joint in computer.
http://forums.rennlist.com/rennforums/showthread.php?p=5108711#post5108711
Kelly-Moss looks like a nice shop.
http://www.kellymoss.com/
2nd Update: another 85.5 poster says its the fuel pump. Jimbo7.1
http://forums.pelicanparts.com/showthread.php?p=3771815#post3771815
John_AZ