2002 Ford F-150

Engine Performance problem
2002 Ford F150 V8 Two Wheel Drive Automatic 80,200 miles

2002 4.6 AOD 2WD. 80,200. Recently replaced plugs, and fuel filter. Had vacuum hose replaced not long ago. Idles smoothe, engine runs strong, but when I 'Get on it' it just seems to be lacking somewhere. Any pointers towards getting back lost horsepower?
July 22, 2010.

Lack of acceleration, chugging, hesitating, bogging 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.

Jul 22, 2010.