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.
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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