you have to have a vtec computer first off. Then you have 3 wire that need to be run. One ground wire from the pressure switch under the vtec solenoid. then you have one power wire from the solenoid that goest to the ecu, and there is one power wire from the pressure switch that goes to the ecu. Depending on what ecu you have and what OBD system you will have to get a pinout of you ecu to know what connections to make on the ecu. Its a fairly easy job to wire vtec up to the computer how it should be done. just dont run Vtec on a toggle switch. Its not the best idea since you can burn up important parts of the vtec system. And remember vtec is fed by oil so make sure you have you oil feed done right as well