ok I have a 95 jimmy. I found the vaccum hose that goes to the intake disconnected. When I reconnect it my truck bogs down like it wants to die. I replaced all hoses on the check valve except for one that looks like it runs down under the car (where does it go?).I searched and found another hose that was zipped tied to oil dip stick with a plug in it (previous owner?) cruise control never worked my 4x4 did and my vents blow out of only the defrost.can the vaccum be the reason the vehicle suddenly dies when idling?

 

You want to know if there is still leaks sounds like when you plug that one in it bogs down the vehicle because it is a main vacuum line a schematic for the vacuum lines.