Thanks. IMO, patching binary code can only take you so far. You get complete flexibility when you replace all of the firmware with your own logic.

I'm trying to get into a GM/Delphi E78 ecu with a FreeScale MPC5566 cpu. Evidently it has a jtag interface on the board. I have a P&E Micro Multilink jtag interface that supports this cpu. But can anyone help on pin outs for the jtag port and benchtop power to the ecu? Or any other info (code di...