I'm currently doing this swap. 93' b18a1 into a 93' Civic EX My harness is pluggin up fine to the LS ecu. My problem is the harness pluggin up to the engine. On the passenger side I have 3 plugs out of the firewall, Only 1 the biggest one is plugging up. On the drivers side only 1 of the 3 plugs comming out of the firewall are plugging up. 1 of the 3 plugs has a block plate so its not used. Do I just leave these un plugged? I really don't see how it would run. Please help. I went from a d16 to a b18c sir g and now to a b18a1. I didnt have any of these problems in my last swaps. I bought the cable to hydro conversion, just got it in today. [got it for $35.00 shipped] and am in the process of getting all the motor mounts brackets ect, I sold the mounts that went with my old b18c ;( Thanks for your time. I really do need the help, this is my only car and it hasn't been running for over 2 years.