we are doing a h22a swap into a 92 prelude. how do ya hook up the vtec? do you need a ecu plug for your h22a ecu? or can you just tap onto the existing wires on your original plugs??

 

you need a wiring diagram for both motors or at least the h22 and you need to find out were the pinouts are for the v-tec you will have to wire the IAB wire knock sensor v-tec press v-tec sensor and that should be all

 

does anyone have any diagrams???

 

I dont know there a pain in the *** to find

 

VTEC Solenoid Yellow/Green A4
VTEC Oil Pressure Sensor Blue (passenger side harness) D6
VTEC Ground Black chassis ground
Knock Sensor Red/Blue D3(depending on whether the prelude is an SI or S model)