My car is obd2b and so is the b18c1 i wanna put in.

Can i carry on using the same loom? Or would i need to use some of the plugs from the b18c1 loom? And run vtec wires

 

If the B18C1 is a OBD2B (98-00) too. Then everything should be okay to plug and play to the Civic DX harness. All you have to do is wire vtec, IAB if using the stock gsr intake manifold, and knock sensor. I forgot there is one connector that you have to use from the GSR harness. I think its the IAB connector, I'm not sure. Check what year is your motor first before doing anything. I just did a JDM GSR swap a month ago. It was easy. Everyone kept on saying you have to extend your engine harness and all other bull crap, but its all lies. Its simple. I did H22 and F22B into my brother Accord and GSR swap into my ek hatch.

 

yes, as long as proper wires are added, and some may need to be extended

 

The Y7 uses a 3wire IAC, the B18 uses a 2wire. Youll have to mod that as well.

 

info on the 3wire IAC: I think you need the connector from the GSR harness, so it could connect to the motor. just match up the two wire color to color and there should be one left over, just tape that up.