911 Turbo S Cabriolet (996) F6-3.6L Turbo (2005)
Interference noises due to engine
The following points should be checked first:
INFORMATION:
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Make sure that the battery connections are seated properly and that the ground connection is guaranteed.
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Check whether the ignition coils are loose or defective.
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Check the plug connections and supply lines for the ignition coils for damage.
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Check the ground connections on the engine.
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Check whether the correct spark plugs have been installed and that the electrode gap is OK.
Interference noise due to antenna
INFORMATION:
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Follow this test routine if the interference noises come from the antenna.
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As an experiment, it is worth making a comparison by inserting a rod antenna.