i just bought a 90 ef hatch guy told me it need a wire harness i looked and they are hard to find some guy told me there are no 89-91 civic vtec harnesses but im not sure the car came with another harness it is made by swoosh and it just has two led lights and a knob and it says vtec i dont know whut it is but i wanna knoe and yes the engine does have a vtec solenoid im thinkin that controlles vtec i need more info so please help me out