2001 Hyundai Tiburon

Engine Performance problem
2001 Hyundai Tiburon 4 cyl Two Wheel Drive Manual 177, 00 miles

my car seems to " bog down" when I come out of 1st gear or barely push in the gas pedal. After you get going 3rd gear and up its fine. I changed the fuel filter, fuel pump, plugs and wires and put in fuel injection cleaner. This started about 3 weeks after I bought it. First it wouldnt go at all but once I done the work previously listed its better but still tries to cut out. What else can I look into doing to solve this. I hate to put more money in it and it still not run right.
September 25, 2010.

Lack of acceleration, chugging, hesitating, jerking, bogging, misfiring etc. Could be caused by one of the following below: Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note: If it doesn't apply disregard it.

Sep 25, 2010.