My daughter drives a non turbo S70, which has been very carefully well looked after (by me) over the years, i.e. synthetic oil, regular oil changes, fuel filter change, good plugs etc. The car is about to turn 300,000 km, runs great and has no oil leaks. I changed the oil in it the other day and checked to see if the pcv system was functioning properly by idling the engine with the oil filler cap off and holding cellophane plastic over the opening....no suction detected. Does this mean that the pcv system is plugged, and does anyone have advice as to how to proceed next? Thanks very much for your interest!
Tony