I have also looked for the speedometer 80 pcv diagram, I have come up with nothing, it makes no sense why.it's not just a pcv valve it is a pcv system with several parts involved. That's why I would like a diagram to make sure I don't have a problem there. I've got a engine miss and no one can figure out what the problem is. I think it is the pcv system. I know that on this site you can't post a diagram but point me to a site that may have one. Thanks
RepairPal Certified shops can diagnose and repair your 1999 Volvo S80. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.