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can I get a diagram to replace vacuum hoses ona 986 chevy astro van
go to chevythunder.com, they have exactly what you are looking for
Change the canister.Change the canister.
Yes its in the fueltank
Ford puts most of their vacuum hose diagrams on the air filter housing cover.
Remove the fuel tank to access the fuel pump assembly.
Check the gas cap for rust marks, check the vacuum lines near the air cleaner, check the hoses at the vapor canister under the van.
Check for vacuum leak either under hood or under dash Check for bad vacuum motor underdash Check for bad selector switch
The EVAP Canister is located under the front passenger door.
The vehicle is 18 years old. Replace every single vacuum hose under the hood, as they all need replacing. Very cheap repair. Warning: Replace them one at a time as to not get confused.
Under the cam shaft...
Autozone.com has lots of repair info, including vacuum diagrams. They are listed under emissions and drivability in their online repair guide. They also have a parts description and location guide.