I splice the green wire into MAP Sensor and orange wire into TPS sensor. I connected them behind ECU(31 pin). I started my car and the engine sounded strange. The LED lighted up when I push the gas. but everytime my car went up to 3000rpm, my car would almost stop. what's the problem with that? can someone help me out?

P1259 Error. VTEC system malfunciton.

You probably have tripped an engine code (P1259 Error) and it needs to be re-set.

You should make the connection in the engine bay and not at the ECU.