I found a local seller who's selling the P61 GSR ecu and wonder if it will throw any code if I switch out with the P30? Just want to keep the P30 as a back up since its the USDM one. I have a 89 CRX running a b16 converted OBD1 and everything is stock.

 

it will work fine seeing as the b17 has a pr3 head. i say pick it up, and if you dont want it lmk i might pick it up from you.

 

If you have a stock engine then just use the stock ECU. Why do you need a backup ECU?

 

Ok cool thanks for the heads up.

I'm just keeping the USDM P30 as a back up cuz they are pretty rare and I don't want it get stolen.