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I would suspect you are correct. Replace all vacuum hoses under the hood if the vehicle is over 10 years old. Otherwise find the leak and repair it.

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Q: When stoped at idle shakes the vehicle unless in neutral engine idles like it has a ratackle cam if you rev it up over a thousand rpms it goes away and vehicle runs fine. I think it has a vacuum leak?
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If the vehicle is in gear, the starter will be attempting to move the entire vehicle, as well as get the engine turning over.


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