Check every hose line one by one and it's connection to the engine. Some hoses rot at the connections and can be cut back and reattached. If not - install new hose.
I'm trying to find out how to hook up the vacuum hoses to the carb in a 85 delta 88. I need to know how they go.
go to OBD codes.com they have them for everything sandi
on the sticker under the hood
Hemmings Motor News.com
you can buy the book for that car at a auto parts store
You can find that information in the owners manual.
Here is 1993 Oldsmobile Delta 88 3.8 liter V-6 since you didn't provide the year of yours. [http://autorepair.about.com/library/firing_orders/bl-fo-8157.htm 93 Delta 88]
junk yard
Chiltons service manual
You can find a 1986 Winnebago, with the Chevrolet 454 cubic engine, vacuum routing diagram at most Chevrolet dealerships. The vacuum routing diagram can also be found in most Chevrolet engine service manuals.
The vacuum hose diagram is located on the top radiator fan shroud. If the stickers not there, you can find it in a Haynes or Chilton book.
Any auto parts store. Or Walmart.