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      01-25-2015, 11:17 PM   #8
phil7027
Private First Class
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Drives: 2015 550xi
Join Date: Nov 2014
Location: Staten Island, NY

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UPDATE !!

Well I'm in shock, but I fixed it myself. I can't leave anything alone and the dealer is the last place I wanted my car. I did a muffler delete on my car and left the 2 vacuum lines just tucked up, not plugged or zip tied. I read up on here and a few were saying the lines could pick up dirt and what not and mess with the boost actuator in the trunk on the left side under the covers…. Well long story short, I blew the lines out and make sure the actuator was clean, then plugged both lines and tucked them up and after driving up the block I knew it was fixed. Boost was finally back and the Malfunction light turned off after a mile.

Its crazy that the car was fine for 2,700 miles without being plugged, but whatever theres miles of electronics and wiring on these cars… For anyone in the future experiencing this issue, CHECK THOSE LINES FIRST IF YOU HAVE AN AFTERMARKET EXHAUST!!
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