Whenever I first start my car for the day, there is a light vibration at idle. Once the car warms up the vibration disappears and the car idles smoothly. The engine is perfectly smooth during operation and there is no hesitation. Could this be an indication of warn spark plugs or otherwise? The car also has a AEM cold air intake.I'm not sure if this would affect cold-start performance.
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Wednesday, May 21st, 2008 AT 7:23 PM