hi i have a 97 civic lx and i swapping a b20b, i have the lx harness on the motor . car seen to run fine when its hot but everytime the car is at stop the idle is very very low (almost at zero) i notice that the lx iac plug has 3 wire and the ex has 2 wire. so i took a 3 wire plug and wired it to a 2 wire plug. so anyone that have a similar swap please help