I have a 97 honda civic that had b20 vtec engine swapped in. In New Hampshire, so I need an Obd2 inspection done with the scan tool. It will not read as it it. Appears to be all obd2 wiring with a p73 itr ecu. Not sure if usdm or jdm, rectangle box. New to the honda world, any feedback would be great, thankyou.

 

Would just getting an obd2 hondata s300 solve this or is it something else?

 

No such thing as an OBD2 S300.

What is the full part number on the side of the P73 ecu?

 

Current ecu is Itr p73 ecu, do you want the numbers on the serial code sticker? 37820-p73-013

 

There's no such thing as a "B20 Vtec" motor from the factory, so finding a factory ECU to run it...well, you won't. Exactly what head is on the motor, and what cams are in the head?

 

And I need a tune, at which point I have a guy who says he will put the hondata in there, I believe I am doing this either way. wondering if this is a also solution, or not.

 

It's a Gsr head from a 96, not factory it is frankensteined, b20 bottom Gsr top

 

Get a USDM OBD2A GSR ECU (P72), and cross your fingers. How well it'll work depends entirely on the quality of work done by the person who did the swap.

The tune will require an OBD1 ECU, which you'll have to deal with separately. Neither the ECU you have now, nor a GSR ECU are "tuneable". An OBD1 ECU in your car also will not be readable by any kind of scan tool.

 

Ok, I will try that thankyou. I just need usdm to be able to inspect and then I can play with another ecu until next years inspection basically? ( best case scenario)