my ecu is fine but i also have mt ecu sitting here. and i was thinking that the ecu regulates the rev limits not the tcu . im running into problems with my n2o keep hitting rev limit getting ing cut. i got a window switch a shift kit and some other stuff but im looking for a way to up the limits . im trying to figure out what the tcu is reading from the ecu . the way im looking at it the tcu is reading the sensors off the trans . and the ecu is sending tps location, rpm, speed.im sure its not that simple but thats why im asking questions