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Could be the MAF sensor, or the AOS (Air Oil Separator). Some of the early warning signs of a failing AOS is hunting idle. On the Boxster, the symptoms seem to be more prevalent (engine smokes on start up, and hunting idle), but on the 996 the symptoms may not manifest in such an obvious way. Check engine light on?
Last edited by Yellowb1rd; 05-17-2014 at 02:52 PM..
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