G35 auto swap to manual
 

Do anyone have a popping after the swap ? are can anyone show me how to wire the neutral switch after the swap ?

There is no neutral switch for the manual, Instead, there is a clutch switch at the top of the clutch pedal assembly. I performs the same function as the neutral switch, it closes the switch when the clutch pedal is pushed to the floor, allowing the ignition switch to energize the starter.