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On cold start is it normal to hear a bit of a 'howl' for 10-15 seconds on these--no codes, no issues.

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Secondary air injection pump more than likely. The SAI is an emissions precaution that uses an electrical airpump to force air into the exhaust to burn unspent fuel to reduce emissions. Totally normal. It was used in the 2003 Saab 93SS cars, the V6 models starting 2006 and I believe the 2007 and newer 2.0 models.

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