Hey guys, I think I may have discovered a vacuum leak on my truck. There is a valve of some sort that is bolted to the firewall on the driver's side. It has one large vacuum line running to it from the upper intake, one line the runs back to the fuel tank and a port on the bottom for another line. That port on the bottom has nothing on it in my truck, I can't find any good pictures showing where it should go. My EGR stuff is all deleted, so do I need to run a new vacuum line or can I just cap the port off? I appreciate any help guys!
