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Misfire due to failed mass air flow sensor or failed purge valve on Porsche Boxster

Problem Description and Possible Solution
A failing mass air flow sensor or EVAP purge valve can cause misfire issues.
Problem Data
RepairPal Verified
Average mileage: 70,117 (55,000–85,234)
14 model years affected: 1997, 1998, 1999, 2000, more2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
18 people reported this problem
Comments
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Check engine light, white smoke from exhaust during cold starts, rotten egg or fuel smell from the exhaust, clapping sound or misfire sound from engine, poor performance when engine is hot, and slight hesitation during accelerations. Replace the Mass Air Flow sensor (MAF) and the car was fine.