Most Public library's
http://motodataproject.com/product_info.php?products_id=108
www.denniskirk.com
Autozone has Vacuum diagrams online in their repair manual section http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152800618ea
Take it to a professional. Unless you are well qualified, you don't even want to attempt this on this engine. If you want to attempt this repair, then purchase a repair manual.
You buy a service,repair manual or you take it to a shop
in the manual or haynes repair manual
have a 1994 land rover discovery & dont have owners manual. where i can i get one?
You need to go to a car parts store, and get a repair manual for your car. They cost about $16.00 Or, go to a Public Library.
S20 or S40
Many auto parts stores carry auto repair manuals. Check with them, if they do not have one specific ly for your vehicle they can usually order on for you and get it in quickly.
The question you ask is too involved for a proper answer. You need to go to a car parts store, and get a repair manual for your car. They cost about $16.00
Try: E-Bay Google.com