1997 Mercury Cougar

Engine Performance problem
1997 Mercury Cougar V8 Two Wheel Drive Automatic 149064 miles

when pulling out from a dead stop the car has no power, just replaced the transmission and ran fine, I think it may be the throtle body censor but am unsure could it be some thing else?
February 22, 2010.

Inspect and test all the following listed below: Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position 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.

Feb 22, 2010.