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My 2007 Mazdaspeed3 has been running very rich. You can drive it but I avoid to right now as it will stall at idle sometimes. My AFRs at Idle will be in the 9-12 range most of the time. Cruising is alright, except when you let off the throttle, fuel continues to enter the engine creating pops...

Got a whining sound in my 2007 MS3 GT. Car is fully warmed up, only whines while driving under load, approaching or at WOT load in all gears. Whines pitch does not increase or decrease. One coupler on the FMI popped off but that has been replaced with a new one + clamps, it pulls and boosts...