I installed a cold air intake, similiar to the pop charger, Just testing it out till i get a nismo cold air intake, My question is my car is idling low, Actually when inneutral drops almost till turn off, Did it once in the street while waiting for a light. Do i need to do something to get the idle to stay normal like before?

 

More than likely your ECU will adjust(always changing). You can go to the dealer to get your idle bumped dont know how much money if your concerned run it hard for a few minutes your ECU will adjust.