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      08-01-2017, 09:03 AM   #714
AdamAllenE93
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Drives: 2011 335i Convertible E93
Join Date: Jul 2017
Location: Fresno, CA

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Had a problem you could say.

I had this portion on my car already open cause I was working on the stereo. I saw this post and thought, "I know that part. I'll do this!"

Did it, sounded nice, drove, literally, 1/4 mile and it backfired/misfired, check engine light came on, and the car no longer had boost. I got out, put the sensor back, still no boost, AND when I'd start the car the RPMs would drop and almost stall, then jump back up.

Took it to a mechanic (BMW could get me in for a full week), he said the vacuum tube for the boost popped out and broke, and that the exhaust flap is just a coincidence.

Regardless, I'm terrified to do this again.

TL;DR
Had engine problems right after doing this mod, mechanic says it's a coincidence.
Appreciate 0