The Honda HDS can "reprogram" the ecu. But unless you plan on paying $8000+ for a factory scan tool, you're SOL. The Tech2 is GM's version of the Honda HDS. Both are used to do factory reflashes, not re-tune the car. You can upload a map that the manufacture sends to the dealership/scan tool, but you can alter it to make any changes to up the power.
To do it for the aftermarket, you have to go through hundreds of thousands of lines of code and decipher all of it. For some ecus, (ie the K series) it was worth doing, like Hondata did. But for the stock accord ecu's, there is no return on spending 2 years decoding the ecu.
Listen, our cars have been around for 10 years. If there was a way for us to reflash them, dont you think someone on this board, or Honda-tech, or one of the thousands of other honda boards would have found it? We're telling you there isnt any way of doing it unless you go OBDI.
