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Old 01-29-2016, 06:06 AM   #5
BoxsterLS376
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Join Date: Oct 2014
Location: Georgia
Posts: 391
If you hear air puffing out there are only a few things it could be as what you are hearing is compression escaping when the piston is heading towards TDC.
Spark plug, is it in securely? This is a best case scenario. More likely a cracked cylinder wall or something like that. Either way I'd shop for a used motor.
J
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