XCCESS

I was shift from 1st to 2nd and heard like a lound sound, it sound like BOV turbo car, then my friend who was behide me telling me that he saw a black smoke came out briefly. my car now have no boost, and I don't see any white smoke......no noise of the turbo spool up either....what can it be ?

just vag the car

This is what I found

VAG-COM Version: Release 409.1-S
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Control Module Part Number: 8D0 907 551 M
Component and/or Version: 2.7l V6/5VT G03 0001
Software Coding: 06711
Work Shop Code: WSC 00054
4 Faults Found:
17526 - Oxygen (Lambda) Sensor Heating: B1 S2: Open Circuit
P1118 - 35-00 - -
17522 - Oxygen (Lambda) Sensor: B1 S2: Internal Resistance too High
P1114 - 35-00 - -
16815 - Warm Up Catalyst: Bank 2: Efficiency Below Threshold
P0431 - 35-00 - -
16826 - EVAP Emission Control Sys: Small Leak
P0442 - 35-10 - - - Intermittent

Ochlockonee

A large boost leak. Ignore the lack of spool noise. You have a leak.

üBER.QIK

If its not obvious (a big tear)... then build one of these and do a test. I just made one and its pretty easy.<ul><li><a href="http://www.awe-tuning.com/pages/faq/awefaq_main.cfm?FAQ=35">clicky</a></li></ul>