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Thread: erratic idle when a/c switched on

  
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    F1stuy's Avatar
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    erratic idle when a/c switched on

    When I switch the a/c button on, the idle starts to rise and fall about 300 - 500 rpm. You can feel it when you are driving, when holding the accelerator steady you feel the car accelerate on its own. As soon as you turn the a/c off its fine.

    Any Ideas

    Cheers stuy

    Its a 2.0 diesel on a W.

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    kingofkings's Avatar
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    perfectly normal mate

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    It has only just started to do it though and it does it constantly with the A/C on, not just when it kicks in. I drove from Luton to Birmingham and it did it all the way.

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