OK so I got a d15b2 ef an Im trying to do the dpfi to the mpfi I have the intake manifold off a si crx also the fuel rails an injectors an resistor box I know to do the swap ima need a distributor an a wire harness but i have a pr4 ecu would that mean I would need a dizzy that would match that ecu an also what wire harness would I have to get? Oh an also would that make it stay obdo or would it change it to obd1

 

PR4 will make your car run super rich. As far as the dizzy goes you can use your stock dizzy but may need to change some pins around depending on the ECU you use. If your current plugs fit into the PR4 then its an OBd0 which does not require OBD1 conversion.

 

You will need the Si distributor to complete the MPFI conversion. The best/easiest way to do the wiring would be to use you existing harness and add the necessary wires for the conversion. You should be able to find this information very easily by searching on this site or Google.