94 mirage is spittin and sputterin
 

i bought the car about a year ago from my girlfreinds brother and its treated me just fine. well i gave it to my little sister cause she needed a car and now its spitting and sputterin if you step on it.

the car only has 101k on the motor and it wasnt ever driven hard. if you real slowly press on the pedal it spits and sputters and goes. but if you step on the pedal normal, it just sputters and does nothing.

it idles alright and i checkd the plugs and wires and it has the E3 plugs in it. i was thinking maybe bad gas but i put some new stuff in it. and my dad was saying maybe a sensor?? anyone know?