putting a b16a3 in to a VX hatch using a 93si wiring harness. Passengerside has 4 cannon plugs coming from car harness, si wiring harness has only three to plug into it. what is the extra cannon plug. what am i missing.?

 

good question. bump i'd like to know as well.

maybe you don't need to plug it anywhere because the plug might be for other accessories on the original chassis.

 

the 4th plug is for your wideband o2 sensor. cause your car is a vx and it has wideband o2 for the stock motor.

 

thanks man thought it was giving me problems. turned out to be a bad ground wire. pimpin now.