Picked up my first mustang yesterday and I love it so far. The only problem/function ive found thats weird is sometimes after I fire the engine up its starts humming..almost like its in the clutch or even the throttle..its really weird.. I dont know if its the flowmasters that are on it but i cant pin point it.. also when it hums rarely itll stall out when its in nuetral..almost like i need to get it warmed up so the RPMs dont drop but it only does it at random. Anyone else have this problem??