I found this Check valve coming off the EGR and I don't think it belongs there right? But if it doesn't belong there where does it belong? I couldn't find any other check valve on the diagrams that were brown. Secondly how do u figure out this cluster of vacuum piping. I'm looking at several diagrams i've foundon mud and can follow the lines till they get to that cluster, but once at the cluster It's hard to make out which line it actually goes to..was wondering if you all had any tips ?