The p13 ecu looks for the EGR and the p72/p28/p30's do not. If you are planning to get the car ecu tuned then just get the b series vtec ecu and have the maps tuned. That way you can delete the EGR stuff on the motor. I'm not even sure if you can chip/tune the p13 ecu's. The p13 ecu will run the car fine btw just have to wire in the EGR so you don't get the check engine lights.
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Don't bother giving me "rep", I won't return it and I think it is stupid.
Gracie Barra Clearwater
Gyms in Clearwater, St. Pete and Port Richey
pm me if you are interested in trying a free class at any of the gyms.