I logged blocks 115 and 119 last night to try to determine if I have a leak somewhere that is causing my car to hit limp mode intermittently(see link). From the graphs, it appears that actual/requested boost are fairly close and not nearly high enough to be triggering an overboost condition. I logged part-throttle conditions b/c the car feels like it loses power at ~5k rpms->redline if constant, partial-throttle is applied. If I press the pedal down further, I have full power. I really appreciate any help you guys can provide. Thanks in advance!

<img src="http://pictureposter.audiworld.com/18960/n75_part.jpg">
<img src="http://pictureposter.audiworld.com/18960/n75_wot.jpg">
<img src="http://pictureposter.audiworld.com/18960/wot_boost.jpg">
<img src="http://pictureposter.audiworld.com/18960/part_boost.jpg"><ul><li><a href="http://forums.audiworld.com/performance/msgs/76092.phtml">overboost details</a></li></ul>

That is ECU and program controlled, so it very well could be a leak (or sensor)

N75 duty generally runs from about 95% (Wastegate closed, full boost) to a tapered value of 60% or so at 6K (some boost bleed for a smooth ramp-up) . In your case, the N75 is closing the wastegate again at the 4K mark. The turbo is struggling to deliver the requested boost value beyond this point. This is probably the programming trying to make up boost that is being lost somewhere. This could be leak induced. The 4K mark is also significant in a couple of other areas...Replace the temp sensor if you haven't already and do a pressure test on the system.

I forget what chip program you're running?

the programming is GIAC X. a pressure test was (supposedly) done about a month or so ago, but I will be doing another one soon. The coolant temp sensor is fairly new, so I don't think that's the problem..