Hi guys, I need some help with my 1995 Civic Ex. Here's some backround information. I bought this car in spring with a b16a that I knew at the time was burning oil. So i drive the car for like 6 months. About 2 weeks ago my rings give out so I purchase a b18a1 with a b20 head to swap in. So last week my friends and I do the swap and ge thte car running, however it has issues.

1. It idles extremely low, as low as 250-500 rpms after driving. Pretty sure this has to do with me not having a TB gasket.

2. I have an oil leak out the back of the block somewhere. I'll find out where it is tomarrow in shop.

3. The last problem i have is the codes I am throwing. It's throwing codes 10, 13, and 14. Which are IAT Sensor, BARO Sensor, and IAC Valve, accordingly. The problem is I am not sure which sensors these are and where they are. Also, what color wires should goto the plugs that connect to these sensors (keep in mind its the same harness I used for my b16a if that makes any difference).
Thanks in advance for any and all help

Ninja Edit: I am running an LS intake manifold. My b16a one wouldnt fit would it?