A catch can isn't going to make that kind of difference. I would check the routing on everything to ensure connections and your routing of hoses is correct.so I did this entire delete, but I ran into issues when i was trying to mount my catch can, so I decided to just not include it. After I sealed all of my boost leaks (MAP sensor was ****ed and Dipstick wasnt on properly) the fuel trim shot up (P1128) and I started to burn oil. How important was that catch can? I can’t really put it anywhere In the engine bay comfortably so should I just return to the stock PCV setup? I also don’t understand how it even works. Is it supposed to create a vacuum in the crankcase? Or not? Why does sealing the system with just hoses ruin it? I’m utterly confused by the system.