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Idle engine is erratic

44K views 59 replies 30 participants last post by  Unctuous  
I think I know the issue you describe. I wouldn't call it a rattle but there is a slight vibration you can feel in the seat and in your feet. A half filled bottle of water will have some "waves" at the top.

The rpm gauge is stable and a slight push on the gas petter at idle park will even it out.

Is this what you are describing?