What can cause my engine to idle roughly and when it first start to drive? When I first start to drive it sounds like it is misfiring!
Mar 25, 2010 at 12:45 PM
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RASMATAZ
✓Experienced Mechanic
75,988 POSTS
Engine running rough or misfiring can be cause by the following-inspect and test all the following below:
1.Defective spark plug.
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.Idle air control valve.