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Inactive Cyl and no CEL error codes? Serious DME problem. A missing cyl should cause a flashing CEL requiring a flatbed ride the the Porsche Dr. Clearing the DME and fresh fuel might be a good start. I want to know A/F ratios, compression and spark advance also.
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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