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      09-29-2011, 04:16 AM   #60
Simple5
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Drives: 2013 M5
Join Date: Jul 2011
Location: USA

iTrader: (8)

Happened to me as well. My symptoms were:
1) Half Engine Light
2) Only boosting at 3-4psi on JB3 Map 3
3) Installed JB4 and found the code to be 30FF
4) Popped off bumper and re-installed intercooler (passenger side had oil coming out of the pipe where it met the intercooler and cleaned it all out.
5) Drove the car around but NO BOOST AT ALL. Feared it was a blown turbo.
6) Found one of the vacuum lines had split in half and blown off. The one directly beneath it was going to go as well.
7) Bought the same kind of hose as the OP and replaced both.
8) Now car boosts perfectly and I can enjoy my JB4.
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