Quote:
Originally Posted by Dackelone
Maybe you are getting detonation in the higher gears. Most cars will build more sustained boost in higher gears. What kind of fuels do you use?
Or maybe you have a boost leak or BOV problem. I would take a good look at your charge pipe. Maybe even remove it and check it for cracks. Also... the vacuum lines going to the wastegates have been known to blow off at the turbo(s).
Dack
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No, it's not this, here is the graph (magnified at the shift event) and you can see how the ECU orders the boost (boost target) to rise slowly with a pre-defined slope. It's like it tries to protect the drivetrain. This only happens in certain cases, however.
GIAC said that it is a transmission protection (very plausible) but the question is, does the 1M have it or not ?