also does anyone know diff between ps9 ('91 civic ex a/t d16a6) and a p0a ('90-95 accord f22a) both are obd-0 and will the p0a work in a '91 civic dx a/t with mpfi conversion? just trying to find a ecu to complete mpfi. thx

 

I would say no based purely on the fact that the engine will drown with all the extra gas the Accord ECU will try to inject into it.

An 88-89 PG7 (Integra) or a 90-91 PR4 (Integra) will run it if you are desperate, but still run rich. Try to get an 88-91 (Civic/CRX Si) PM6 for best results.

 

Would a p28 work...I might have one if I can get the break soldered right on the main board

 

No. A P28 is OBD-I.

 

so is the pg7 is plug'n play? and how rich will it run? the d16a1 is a 1.6 like the a6,z6 or y8 and as far as i know most don't seem to have a problem with running too rich or does the pg7 force the injectors(240) to flow more than the pm6 or p28?

 

Your DX block is only a 1.5.