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ROUGH IDLE ON
1990 Nissan Sentra
June, 23, 2011 AT 8:22 AM
1990 sentra xe has rough idle in park, already changed oil, filters(air, oil and fuel), spark plugs, distributor cap and rotor and spark plug wires, what else could be causing this rough idle?
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June, 23, 2011 AT 10:43 AM
Engine running rough or misfiring can be cause by the following:
1.Defective spark plugs
2.Inadequate spark/coil,defective spark plug wire.
3.Lack of compression
4.False air leakage.
5.Faulty fuel injectors.
6.Insufficient fuel pressure.
8.EGR valve that is leaking.
10.Throttle position sensor.
11.Manifold absolute pressure sensor
12.Mass Airflow Sensor
13.Idle air control valve
Note: If it doesn't apply disregard it-
Check the idle air control valve,auxillary air control valve and airflow meter
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