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1988 Nissan Maxima stumbling at 2000 RPM

Tiny
WILLYSCAR
  • MEMBER
  • 1988 NISSAN MAXIMA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 390,000 MILES
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.
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Saturday, May 29th, 2010 AT 6:07 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 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.
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Saturday, May 29th, 2010 AT 6:27 PM

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