well its fuzzy on these models. mine wasnt prewired for v tec and its a 95 so 94 may or may not. but my wifes is a 93 and hers is pre wired to the plug where the engine harness plugs and so is my buddys 92. but the d15 engine harness wont be pre wired. you can either find a diagram and pin it into the harness if the existing vtec wires are there at the plug ont the pass side strut tower,(via chilton or some form of digram) or pin straight to ecu.