1995 Plymouth Acclaim

Engine Performance problem
1995 Plymouth Acclaim 4 cyl Front Wheel Drive Automatic 50000 miles

My Acclaim wont accelerate I have changed the fuel filter the transmission is ok its not the speed sensor or the tps or manifold pressure it just seems to start ok when in park and I push the gas it revs up like it always has but when in drive it acts like its just not firing right its almost like the whole engine stops working
May 27, 2010.

Inspect and test all the following listed below and get back with some results

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.

May 27, 2010.
Kick down on transmission stuck, cable for kick down is connected to the throttle. When in gear the stuck kickdown will not allow the gas pedal to be fully depressed.

Sep 16, 2010.