according to Vadis and Chilton's volvo manual there is a vacuum tank in 850 series volvos which is located right next to charcoal canister.. however I couldnt see this tank in my 850.. my 850 is a '95 N/A.. do you have this tank in your volvos?
the tank is shown in the diagram given below.. and the pipe which is connected to the tank ends at vvis solenoid.. picture given below.. but in my car this pipe is hanging free..

picture of the vvis solenoid

any clarification will be deeply appreciated..















