I am having a problem when I first start my car (01GT, only mods:K&N air intake and slp catbacks)...It will start but not idle by itself. It sounds like its having problems breathing, maybe a sensor? I've been having to drive to work the past few days keeping the car idling manually (which is a problem in itself having a manual trans). The problem comes and goes, sometimes it will start right up and idle fine and other times just die over and over. Any suggestions? Thanks.