what exactly do i need to do in order to put an integra odb2 b-18 into a honda ef 90 si??

 

Completely depends on what ecu you want to run and if you need it to pass SMOG/Emissions stuff.

If you want to run the OBD2a or OBD2b ecu, then you will need to get an Pre-OBD to OBD2a or b conversion harness (www.rywire.com) and then you can use the OBD2 distributor and O2 sensors.

Did you get the entire swap? Distributor, injectors, both secondary and primary O2 sensor, ecu, engine harness, etc? Need more information on the swap.

You can also get a pre-OBD to OBD1 conversion harness and run an OBD1 ecu with only one 4 wire O2 sensor and still be able to use your OBD2 distributor, etc. Many options, just need to know what you want to do.

 

I have the complete swap with everything including the wiring harness. My friends say i half to convert the car to obd1 to run the obd2 engine..