I have an 03' GT with several mods, including a P-51 intake which I just installed last week. My question is that the car runs great going down the road and at wot but at idle I hear a huming noise coming from the center of the intake. The car Idles a little high and hangs a bit until I take the hose off for the idle air control valve and pinch it off, and then it idles great. I have checked for air leaks and I can't find any. If anybody has any suggestion please reply. Thanks !!!!