ok i got a chipped p28 and hondata s200 used , it came with a blue box and ecu thats it , my question is what do i need to tune my car with this. i have romediter 4 on my computer.i just want to put a base map on it so i can drive it, the ecu i bought was tuned for a fully built b18 , and will not start my car , i have another p28 my car runs on but it dosent build any power.

 

Start reading the hondata.com tutorials. Also google the import builder's tutorials they wrote a long time ago on an intro to tuning hondata.

That will get you started. If you still can't figure it out, take the car to a hondata tuner.