ecu for 00 si=1.6 vtec
ls/vtec=1.9 vtec

what you're running right now is ecu for lower displacement and different timing maps. ls/vtecs almost always need to use a socketed/chipped and tuned ecu. sometimes you can get away with running a gsr ecu since they are same displacement...think of a ls/vtec as a gsr w/ more torque and less revs.

let me know if you want a socketed/chipped ecu.