We're switching a 1998 Civic LX over to a B16B set-up. Problem we are running into is the IACV connections. The IACV on the B16B is a two pin male connector, and the harness off of the LX is a three pin female connector (blk/blu, yel/blk, and orange wires). Of course the question is how to get this to work. I know someone else out there has dealt with this, (I did a search but couldn't find anything conclusive) We are confused with what wires to switch more than anything. Or is there a possibility of switching out for the original LX IACV? I've heard that the EX one will work but wasn't sure about the LX one. Thanks for your help guys.

the tube

 

I dont know if this goes the same for you
but for my b18b going into 96 civic, I had to take the 2Pin from the b18b harness, and extend wires to my A12-A14 ECU. I didnt use the A13. I did this recently, so I cannot vouch yet if this is the correct wiring setup.

 

bump for the day crew

 

the civic ECU uses the 3 wire setup:
Blk Blu - Sensor +
Orange - Sensor -
and Blk/Yel - sensor voltage

what you need to do to use it with the 2 wire b-series type is cut off the 3 wire connector and put a 2 wire onto the blk yel and blk blu wires.
You will also have to move 1 wire at the ECU side too. You said your car is a 98, but what ECU are you running on the new motor?