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Old 11-20-2012, 12:33 PM   #3
xi_ter
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Join Date: Nov 2006
Location: Edmonton, Canada
Posts: 2,222
My Ride: 2003 325xi
Fill the hose between the valve and the secondary air pump with Seafoam before you start the car in the morning. The secondary air will blow the Seafoam into the engine. This burns off carbon deposits in exhaust ports and increases the air flow.
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