okay well I have obd0 honda crx with a JDM B16A1 motor.
My ECU is a USDM chipped P28.

Well my question is how do i check a code with this set up?

I have a obd0 to obd1 jumper harness.
Everything seems to be wired correct
The car runs and drives good
It has hit the crossover vtec point once since i've had the swap done


The motor doesn't like to idle cold it like to just shut off.

I'm just wondering how or where I would check the code on this car thanks for any help i can ger