WHAT IS WRONG WITH MY INFINITY J30,,,,,,,,,,,,,,,

I change the Mass Air Flow Sensor
New Spark Plugs
New Trothle Sensor

Car Start, but would not accelared, won't move, I push the pedal to the Floor and still nothing,,,,,,,,,NO ACCELERATION AT ALL.


CAN ANYONE PLEASE TELL ME WHAT COULD IT BE........

Transmission Fluid Low? Flex Plate Might Be Damaged