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Dig deeper. You still need to find out Why the misfire on cyl 1 & 4. Changing sensors may solve nothing except wallet weight reduction.
Any other codes?
Year, model, mileage?
Recent mods or repairs?
Any other symptoms?
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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