Fichera0430

Ok so I'm really lost right know and am in need of someone to guide me in the right direction please!! So I bought a 2011 forester with a fb 25 motor had it for a month engine crapped out on me cause it threw a rod I'm limited on funds so I couldn't get the same motor so I found a 2011 subaru legacy with a ej 25 sohc so I grabbed it threw it in and all it does is crank and the harness that it came with is the one I used so the main plugs only the gray one is plugged in it didn't have the brown one is that my problem? It's my family's only mode of transportation so I got it all done in 2 days and never done a subaru motor and really don't no to much about them if there's any guidance someone can give I would greatly appreciate it