Mechanics

ROUGH IDLE IN DRIVE

2000 Mitsubishi Galant • 268,000 miles

I have already cleaned the throttle body and the mass air flow sensor. There is not a check engin light on.
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Edwardbarron
September 5, 2011.



http://www.2carpros.com/articles/engine-misfires-or-runs-rough

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.
7.Contaminated fuel.
8.EGR valve that is leaking.
9.Oxygen sensors.
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-

Rasmataz
Sep 5, 2011.