The way its set up isnt to my liking, I wouldnt vent it as the vapors are pretty harsh, almost made me pass out on my last road trip. Id say run a hose from the location of the PCV valve to the top of the intake an down to the airbox if anything, you have alot less vacume and the vapors are still going out the tail. Plug the manifold. If your still on warrenty take it to ISUZU and tell them that your going to get it emmisions tested if they dont replace your motor. Tell them you already have it on paper you telling them its on the way out and out of spec, date and time. Also throw in how they tryed pushing you out the door. Even if your not in a state that dosnt have emmisions tell them your going out of state to prove the point. When you have it on paper you can get them fined $10,000 to $50,000 for a corprate emmisions violation, they dont want that. Most people would just walk away like I did because I didnt have the knowledge I have now.