Misfire and running rough

Started it one day all the sudden it was misfiring, check engine light came on, horrible fuel consumption, no pick up. Changed plugs, wires, fuel filter, coil, injectors, throttle position sensor, cleaned MAF sensor, check fuel pressure, checked catalytic converter. The check engine light on, threw a po174 sensor in bank 2. Would barely go up a hill. After doing throttle position sensor it had a lot more power and pick up but still missing. What else could be checked? I am out of ideas.