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Question... Are you sure your O2 sensors are bad or are they simply reporting a problem upstream? Bad MAF, Failed AOS, Intake vacuum leak, Bad gas cap, etc. Always annoying when you change parts and it doesn't fix the problem. What are your codes?
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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