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There is a vibration noise on pulling off,but goes away when revs are picked up

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  • Kathleen Rayson
    Kathleen Rayson Apr 08, 2015

    On further investigation could it not be the alternator that caused the viberation as now the car struggles to start and the lights now dim And the battered is fully charged . Thank you for ur help so far

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  • Cars & Trucks Master
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When a vibration suddenly starts to happen, it means that something is loosening. Usually it's a panel or a sheet of metal that's vibrating on it's resonant frequency, that's why it goes away with speed, it passed the resonant frequency.
It's very hard to find because you have to be under the car to see it. If you find something you suspect, tighten the screws or put a rubber band on it to test it.
I have tht on a HHR, but I havn't found it yet. onits

Posted on Apr 08, 2015

Testimonial: "Thank you for that. Do you perhaps think it could be the alternator for that the lights are now dim , the battery is fully charged and the car struggles to start . Could that liberation notice be the alternator bearing packing up?"

  • danoyachtcap
    danoyachtcap Apr 08, 2015

    Yes, if the noise is sort of grinding or whistling, it could be the Alternator. But if it's a pure tone note that disappears when you go faster or slower., is more likely a loose piece of metal or panel.

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