Hello... Just bought a used car and within 30 days of ownership - appears to need repair! When I start the engine of my 2007 Infiniti FX35, the engine flutters and continues to flutter and has reduced power as I drive - the "service engine soon" light comes on and off. Also......There is also blueish/white smoke bellowing out of the exhaust when I crank the car. Please help me with possible causes.....