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2008 zetec Focus 1.8, slight miss fire when accelerating in fourth gear, pulling onto motorway yesterday and tried to accelerate and it was as if something was holding me back

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  • Mick Harrison May 09, 2017

    car was serviced wen i bought it 3 months ago, but did they put new plugs in i dont know. if i scan will it show a fault or not ??

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  • Cars & Trucks Master
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A miss under load on a Focus is usually a bad or failing coil on one or more of the plugs.Also how old are the spark plugs?

Posted on May 08, 2017

  • D Aubrey
    D Aubrey May 09, 2017

    If the misfire is bad enough it will show a code identifying the cylinder or cylinders misfiring.The coils are a weak spot and fail.
    If you are keeping it,I would suggest new plugs and coils on all cylinders with boots and the miss should be gone for years.Get a set of coils with boots on ebay for $ savings.

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