I changed my air intake and everything seems fine except I noticed my idle is below zero rpm now the car feels fine. Is the car not use to the normal amount of air it's getting now? It seems to be running fine but this caught my attention please help.
I would recommend checking that you go through your engine bay and check that you didn't forget any plugs or connectors while installing the new intake. If your car is running then RPM's SHOULD be displayed, so it seems that the cars computer is just not receiving that information due to a disconnect or maybe a blown fuse.