1988 Nissan Maxima stumbling at 2000 rpm

1988 NISSAN MAXIMA
390,000 MILES • 6 CYL • 2WD • AUTOMATIC
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WILLYSCAR
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  • 1 POST
Engine idles great but begins to stumble at 2000rpm. Have replaced throttle pos. sensor, mass air flow meter, plugs, wires, coil. I Am still getting trouble code of 12( air flow meter.) Any suggestions on what else to look for. Car has had one owner and has had all regularly scheduled maint. done.
May 29, 2010 at 6:07 PM
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RASMATAZ
  • CERTIFIED EXPERT
  • 75,992 POSTS
Inspect and test all the following listed below

Test the airflow meter

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 29, 2010 at 6:27 PM