Verified VCDS User
- Feb 24, 2014
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The logs are actually terrible, they start 2/3 of the way through the power band and there is a shift. You can't tell therefore cannot say that it didn't reach a higher boost level from what is shown, other than the op saying it only goes to stock boost. These ecus will close the throttle for numerous reasons, doesn't even require an overboost condition. Some of them do it 100% stock for torque smoothing.I don't know if I agree with this and would expect an increase in boost momentarily......... before a throttle closure if that is the case.
Ignoring for a second that stock and tuned are requesting the same boost (which is a stock level of boost for a TTRS)... If (op will need to confirm) the one and only change between the stock logs and the tuned logs are the tune and they are actually producing the same level of boost then there was no hardware changed/fixed but the car runs better, that means tune. The tuned file is running a clamped wastegate and the stock file is actually controlling the wastegate at the same requested boost with just a software change.
Where did the OP state it ever worked fine on the tune? The very first line states this is an on going issue that has never resulted in higher than stock boost levels.As stated.......... it's a hardware issue or FOD and most likely not tune related, since it ran fine from spring till about now according to the OP.
UM is also an adjustable boost program, so something may be going wrong there.
3rd or 4th gear pull from 2k to redline with actual/requested boost and duty cycle would be a good start to actually see what the car is doing, you can't tell from these logs. Then confirm the throttle is open and the timing is sane.