If it is NOT the right key, the engine would not even turn start. There are a couple of things needed to be check, do you have enough fuel to the injector? There is a CAM sensor, that control the spark to the engine and Crank sensor (check for loose wires or most of the time oil leak onto the connector). I am not sure of the 4 cylinder, but the V6 has the CAM sensor on the very back of the motor (where the distributor once was).