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Rough idle & very sluggish

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  • Rough idle & very sluggish

    Who knew that a single bad spark plug would cause this?! Just getting the coupe back on the road this week but engine was running like a bag of nails. Shaking car at idle, very poor pick up and no performance. I'd have put money on it being a bad coil but turned out to be a dud spark plug. I changed them all anyway as I'm sure the others won't be too far behind. Sailed through the MOT today too
    1998 ///M Coupe


  • #2
    Had exactly the same thing - simple spark plug changed sorted it. The cause for mine was lack of use - lesson learned!
    2000 Dakar Yellow

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    • #3
      Cheaper than a coil pack

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      • #4
        Originally posted by Dave P View Post
        Cheaper than a coil pack
        True, although ECP have Bosch ones in the sale at only £34!
        1998 ///M Coupe

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        • #5
          Originally posted by Ian_C View Post
          True, although ECP have Bosch ones in the sale at only £34!
          About half the price of a dealer

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