The vacuum line you are looking for it the small upper-most line on the intake manifold. This is the line that provides vacuum for the crankcase ventilation system.) Remove the line, and remove the brass nipple -- I think it requires a 10mm wrench. Most likely, the nipple AND the vacuum hose are plugged solid. Use a small drill bit or a nail to unclog the nipple, and get a new lenght of vacuum hose. I found some great brown/orange silicone vacuum hose at Napa. It's much better than the Volvo rubber stuff. It comes pre-packaged in 8 or 10 foot lengths. It's good stuff to have around when you're working on cars.

That should take care of your crankcase pressure problem.

Jeff Pierce
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'93 945 Turbo ( one kickass family car ! ), '92 Mercedes 190E (my daily driver), '53 Willys-Overland Pickup (my snow-plow truck/conversation piece -- sold to a loving home), '85 Jeep CJ-7 w/ Fisher plow