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Old 11-27-2012, 08:01 PM   #506
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Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 10,947
My Ride: '06 330CiC, '03 M5
Turn engine off and depress the Schreader valve with a toothpick cut flat or something else to fit inside the test port. The fuel rail should hold pressure for hours. Watch your eyes, use a rag to protect the spray from going everywhere.
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