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Spark plug change and check engine light
Just changed spark plugs on my 996. After much swearing and extreme body contortions, only to find engine runs rough and check engine light pops up to confirm something is amiss. I think that the problem lies with the coils. Either there is a connection problem with the clips, or one or more of the coils is faulty. I plan to recheck connections, or is installing a new coil pack recommended? Thanks
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