On my engine (B18C) on the front of the cylinder block just under the valve cover, P72 I is stamped, does that mean that my ECU is OBDI/P72 ??? Might seem like a stupid question, but i dont know what ECU i'm running. BTW i have a JDM SiVTEC integra (94)

 

On the passenger side, on the bottem right, where you put your feet, there is a panel on the right. Behind the panel is the ECU. There is a barcode on the ECU. Under the barcode there is a number. Yours should be 37820-P72-???-???-??????. You can tell which ODB it is by the plugs. Check on http://www.hondata.com in the technical section to see the difference in the plug set-ups.