2002 Ford Taurus 6 cyl Two Wheel Drive Automatic
when I start my car and it is in park my car feels like its jumping, the rpms move up and down. But once I drive it for awhile it stops I went and got a trasns flush, oil change and all filters changed. I want to know if maybe its a tune up I need and if its the sparkplugs, or maybe something with the fuel system. I ruled out bad gas too.