1995 Nissan Truck Engine slows and sputters at 3000 rpm

1995 NISSAN TRUCK
285,000 MILES • 6 CYL • 4WD • MANUAL
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FSTONE
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The engine starts to slow and sputter at 3000 rpm. A mechanic found nothing wrong when he checked the computer. He replaced the air intake control, cleaned the fuel lines and replaced the filter and replaced the plugs. None of that worked so he thought it must be the computer.
My question: any other possibilities? If it is the computer, where is it located?
Mar 20, 2010 at 6:12 PM
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RASMATAZ
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Lack of acceleration,chugging,hesitating,bogging etc. could be caused by one of the following below.

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.
Mar 20, 2010 at 6:20 PM