Did a search, but didn't find anything useful..

I have a 92 EG hatch with an OBD1 B18C1 motor and OBD1 P28 ecu with Hondata. I'd like to swap in a OBD2 B18C1 motor with OBD2 ecu (P72), but not sure what I need to do.

Do I just need an OBD2 motor + OBD2 engine harness? What about the instrument cluster, since it is ODB1, how do I plug it into the OBD2 ecu?

Thanks!

 

use the obd-1 harness and dist also use the obd-1 ecu that all you have to change

 

use the obd2 harness with distributor and obd1 ecu

 

Yes do just as salbaje said both OBD1 and OBD2 use the same impedance. I would so however cut out the sensors that you don't need to make it look cleaner. For instance the crankshaft speed fluctuation sensor and the secondary O2 are no good for you on a OBD1 car.


[Modified by JDMspecEG6, 2:50 PM 3/30/2002]

 

the only diff beteweet the 2 is the dist plug and the injector plugs. thats all you will have to change if you use the different harness.

 

Okay, I am still a little confused. I use the complete OBD2 harness from the new motor, and use a OBD2 to OBD1 so it can be plugged into the OBD1 ECU? Since the OBD1 and OBD2 ECUs use different connectors, I can't just plug the OBD2 connector into the OBD1 ECU.

Thanks

 

So to drop a OBD2 engine into a car wired for OBD1, all I have to do is convert the distributor and the fuel injector plug ? This sounds too easy! All I would have to do then, is to buy a new OBD1 distributor and fuel injector plug and splice the wires into it? Does anyone make a convert harness for this (would rather not splice and dice)

Thanks guys!