You may be having an issue with either worn or damaged spark plugs, or worn plug wires. Typically these failures will show themselves more at idle and appear to go away under acceleration. Also if you are not feeling a hickup at idle in the motor (misfire) and the engine just seems to be rough, shaking the vehcile, then it could be motor mounts worn out.
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Thursday, April 16th, 2009 AT 12:24 PM