never had a PClll, PCv has two plug for each injector, one plugs into the injector the other into the harness that was plug into injector. very simple to hook up. just can't get plugs off injectors yet. very fragile. am going to have my son help me. one of the signs your getting old, instead of you helping him, he's helping you. been doing this stuff for years, but dont want to break an injector. who knows how long it woud take to get one. don't need any down time right now. beautiful here in arkansas,now