Mechanics

CAR RUNS ROUGH WHEN ENGINE COLD BUT RUNS O.K WHEN WARM

2000 Proton Other • 76,000 miles

When car is started after sitting for long enough for the engine to go cold it coughs and sputters and occasionaly stalls until warmed up then it runs o.K
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Ralph48
December 7, 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-

Tiny
Rasmataz
Dec 7, 2011.


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