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The BMW Range
5 Series
E39
E39 engine mis-firing
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<blockquote data-quote="zidee" data-source="post: 591452" data-attributes="member: 20151"><p>I thought you said Raymond has changed all the coils? Perhaps you did not indicate that they only change certain coil. </p><p></p><p>Based on BMW guide, should diagnostic indicated coil is the reason, all ignition coils should be change in order to get the stable reading. After the change, use diagnostic tool like DIS GT1 to get reading of all the coils. It should read about the same for all coils. Car like Opel or GM come in one set of 4 coils attached (for 4 cylinder engine) to make sure all the coils changed at the same time. Replacing certain ignition or used ignition coil should be for temporary measure. Some say bad coil can lead to the other good coil to spoil faster as it stress the others. For certain model Audi like A4 that uses Ignition Control Module (ICM), bad coil can damage the ICM. ICM control firing for the packs. BMW especially newer model uses different approach to control the firing of coils.</p></blockquote><p></p>
[QUOTE="zidee, post: 591452, member: 20151"] I thought you said Raymond has changed all the coils? Perhaps you did not indicate that they only change certain coil. Based on BMW guide, should diagnostic indicated coil is the reason, all ignition coils should be change in order to get the stable reading. After the change, use diagnostic tool like DIS GT1 to get reading of all the coils. It should read about the same for all coils. Car like Opel or GM come in one set of 4 coils attached (for 4 cylinder engine) to make sure all the coils changed at the same time. Replacing certain ignition or used ignition coil should be for temporary measure. Some say bad coil can lead to the other good coil to spoil faster as it stress the others. For certain model Audi like A4 that uses Ignition Control Module (ICM), bad coil can damage the ICM. ICM control firing for the packs. BMW especially newer model uses different approach to control the firing of coils. [/QUOTE]
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E39 engine mis-firing
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