Fuel injection simply measures the air ur motor is using and calculates how much fuel and spark advance. Tuning changes that but its not that much different. It like im not flooring my car. Thats all. Major improvement with the new ecu. Even if it is running rich or lean the spark advance is awesome!!! The other problem has got to be a sensor. When it all works right its stupid fast. It just doesnt so it all the time. It will all come together. Intake Hondata = not to many hondas beat me. Oh yeah I hollowed out the cat too. Do u really think it would be smarter to build the engine first and then get the ecu?? Ecu then motor. Then I can use it.