Mechanics

ROUGH IDLE

2002 Nissan Sentra • 4 cylinder FWD Automatic • 100,600 miles

What would cause a car to have a rough idle at a stop only when it is in gear?
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Zelldog93
May 23, 2011.



Check the idle air control valve -auxillary air control

Rasmataz
May 25, 2011.
Just replaced it and it wasnt the problem I have had the problem for a while and I have replaced a few things and just got the head gasket replaced with new timing chains and everything for timing

Tiny
Zelldog93
May 25, 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
May 25, 2011.