With a misfire you should have error codes logged in your DME with a possible check engine light. Get a code reader to see what is going on inside. Lots of possibilities.
* Rodent damaged wire harness
* old/bad fuel
* failed MAF
* failed O2 sensors, bank 1
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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