1996 Isuzu Trooper

Transmission problem
1996 Isuzu Trooper 6 cyl Four Wheel Drive Automatic 195000 miles

I have a 1996 Isuzu Trooper that seems to hesitate from 35-40 mph. The transmission light is not on and I have had the fluid and filter changed. Does it need to be rebuilt?
June 30, 2010.

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

Jun 30, 2010.