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What is the cause of a car engine misfire in an Audi A4?

I have noticed my Audi A4's engine has been misfiring and I can't figure out why. It seems to only happen while driving at high speeds. What could be the cause?

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The most common cause of an engine misfire in an Audi A4 is a faulty ignition coil. It may also be caused by a clogged fuel injector or a vacuum leak.

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Another possible cause is a faulty spark plug. It is important to check and replace them regularly to avoid engine misfires.

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